acolchado easy quilt pattern fabric scraps project free block free pattern free quilt

Quick and easy “Doubly striped Half Square Triangle block” (Hidden wells)

Easy block tutorial - from fabric strips to quilt block

This block can appear to be a bit complex at first sight but it’s quite simple to do. All you need is 4 strips of fabric the same size sewn together. Use high contrasting fabrics for better results. My choice of fabric makes this block a bit hypnotic, don’t you think?

How to make the Doubly striped Half Square Triangle / Hidden wells block

Learn how to make this block in just over one minute:

Make the tutorial twice and make a different block altogether! Learn how:

Some ideas for extending this block

This block can be made into a scrappy quilt by using your fabric scraps or jelly rolls. I do find however than this block works a lot better, and I mean A LOT, if you plan your fabrics and colours.


For instance, use fabric that are high contrast and alternate them:

  • acqua and black,
  • red and white,
  • red and black,

actually any light colour and black or white would work well.

Use only 2 fabrics, one print and one white or black.

Try with solids. Black and white would look great.

Use complimentary colours or interesting colour combinations. Checks, strips, polka dots, types of fabrics work great.

Work with tone on tone fabrics or with few colours.

Do blocks in 2 different colour schemes that work together and combine the pieces.

Strip width and number

You can play with the width of the strips. To keep it symmetric you need to make sure that your outside strips are the same width and the inside strips are the same width as well.

You can use more than 4 strips too as long as they are even numbers and you keep the width symmetric as well.

Note: Since I made this block I’ve been told repeatedly that this technique was developed by the 3 dudes however I have come across earlier examples of this type of block going back to 1989 and Mary Ellen Hopkins and her quilt Hidden wells. Go to google and look up Hidden wells and you’ll see so many quilts using this technique. They’re spectacular.

As you can see the possibilities for this block are quite incredible. The quilt layouts are also varied.

Quilt layout with sashing

Layout 1

Quilt with sashingQuilt design - Easy block tutorial - from fabric strips to quilt block

Layout 2

Quilt with sashing in black. Other colours can be used to match your choice of fabric for the block.

Quilt design - Easy block tutorial - from fabric strips to quilt block

Quilt layout without sashing

Quilt design - Easy block tutorial - from fabric strips to quilt block

Alternative placement of blocksQuilt design - Easy block tutorial - from fabric strips to quilt block

Order my book Turnabout Patchwork

“Turnabout Patchwork. Simple quilts with a twist” is all about playing with blocks – making a block, slicing it up, and turning or repositioning the pieces to make a completely different block (sometimes two smaller blocks) to yield endless quilt tops.

Order Turnabout patchwork by Teresa Mairal Barreu - TeresaDownUnder

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Visual process

From strips to quilt block - half square triangles block


  1. I just love your short and to the point videos. Cannot wait to try this one with scraps? And maybe one solid color strip to tie everything together? Wonder how that will look……..even if I do mine just like yours with all prints, I know I will like the ease of it……..THANKS

    Liked by 1 person

  2. Thank you Dottie. I´m very happy you like my short videos. I make them the way I like them so I thought other people may appreciate them too. Good luck with this block. I only tried one fabric combination but your solid and print combination could work out really well. I think this block is very versatile in this way.


  3. Love this! My daughter and me are making hot pads for all the family members for Christmas. We have all kinds from string squares to pinwheels to this now. We made this today & love it. It looks so complex, but super simple. I already have some more cut out for her to sew on tomorrow. If you look this title you gave this up on Pinterest, you are the only one with this. Is there another name for these? Or, did you come up with this on your own?


  4. I actually have no idea if it has a name. I made the name up based on the kind of fabric I used and it being a half square triangle. But I just did a bit of research and It’s probably called 3 dudes. I hope this helps.


  5. Fun! My daughter is just 10, so she is very new to any kind of quilting herself. Right now she is eager to jump in and learn a new square. She felt so proud of this one. I think I may made it as a baby boy quilt soon using some manly fabrics. I know babies like the busy black and white patterns, so that might be a good idea.

    Liked by 1 person

  6. That sounds like a plan! Good luck with it! That’s pretty good quilting at 10. She may want to try some disappearing 4 patch blocks too.


  7. Thank you for the tutorial, I’m a beginner and need the easy ones. I need to know how much material I needed, I want to use 4 to 8 fabrics? Thanks again.


  8. Hi Linda, for a block you need 4 strips of fabric each 2 1/2inch x 18 inch? This block is perfect for fat quarters. Fat quarters are usually 18 inch x 22 inch. For 16 blocks and 8 fabrics you will need 8 strips of each fabric. Do you agree?


  9. My math isn’t great but I think that this block will work with any number of strips as long as it’s an even number. So you could use 12 strips 1 1/2 wide.


  10. If I were to buy yardage (instead of using a Jelly Roll), how much of each print would I have to get to make a quilt somewhere between a throw and twin size?

    Liked by 1 person

  11. Lisa, My math isn’t great. I don’t want to give you a figure and then be wrong. There’re a number of quilt fabric calculators online you can use.


  12. I have watched all your tutorials. I am so amazed at how quick and easy your blocks are. Such talent. I’m going to try your origami block in a table topper. Please keep the tutorials coming. Great work!

    Liked by 1 person

  13. Jennifer, I’ve never had a problem cutting on the bias but I’ve heard it can happen.


  14. If you take 4 strips that are 2-1/2 ” each and sew them together with 1/4″ seams, your total should be 8-1/2 inches, not 8-1/4.

    Liked by 1 person

  15. That is the math, you’re right. My quilting in the other hand is not as accurate that ‘s why it’s best to measure the piece after sewing to make sure you cut a square if you think your sewing is not 100% accurate


  16. I have a lot of red/white/blue prints, blenders and solids left over from 2 quilts I made. I think this is the perfect project to use up those pieces!

    Liked by 1 person

  17. What is the finished size of your block? Curious because I might want to make a different size. Sorry if I missed it in the post.


  18. No matter how precise I sew, I cannot get the blocks to 8-1/4, so I cut as close to that as possible, sew the squares together and then I’m trimming the block to 5-1/4″.

    Liked by 1 person

  19. This method is not the most accurate. Starching the fabrics may help But trimming is a good solution too.


  20. I am a first time quilter, i have all my squares done in 4 blocks, my problem is, i got the top and side riws done, but how do i sew the rest together without seeing the seams? Thank in advance


  21. If you are 100% accurate in cutting and sewing the strips should be 3.5″ for a 12″ finished block.


  22. I love this! I saw it on pinterest and just had to try it. I used a jelly roll from my stash and watched the tutorial. Worked out perfectly and looks so nice! What a great stash buster this block is! Now, excuse me, I must get back to sewing. Thanks again for the inspiration!!!

    Liked by 1 person

  23. This is my first try at jelly rolls. I have not made but 3 quilts, and I an still in the learning phase. But I have made two squares this morning, and I am in love with this easy pattern. I hate cutting out the pieces. But this is just a breeze, I am sold on jelly roll quilts. Thank you for the pattern.

    Liked by 1 person

  24. That’s fantastic! If you post photos on Instagram or Facebook please let me know. I’d love to see what you make


  25. OMG! This is CRAZY easy! So easy even I could do it – and says a lot…! I have an idea: use one pattern (like only dots) in 3 or 4 shades.

    Liked by 1 person

  26. Using fabrics in different shades of the same colour in an ombré fashion will make a stunning block.


  27. I really want to make a kind size quilt with these blocks. Do you have an estimation of how much fabric I need to buy (using 4 colors)?


  28. Here we go, years after you wrote it I’m pinning it. Love your videos. I have a really old copy of Mary Ellen Hopkins Hidden Wells, long before You Tube was even an idea, so you are right on the source.

    Liked by 1 person

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