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I am a big fan of half square triangles. I do not particularly like to sew them, but you can do such a variety of geometric patterns with them. Windblown Square is a good example.

Stepping five steps back, you do not realise at first sight that this design consists of a certain arrangement of half square triangles. You think that you are looking at some rhombuses. Only on closer examination, or when you sew the block, you realise this simple “trick”.

Windblown Square

© 2012 by Heike Scharmann

When having a closer look at another block, I realised that it is exactly the same pattern as Windblown Square. The only difference is the use of colours.

Whirlpool

© 2012 by Heike Scharmann

I did not like to do two so very similar blocks. So I changed them both. I used five instead of three colours for Windblown Square, and I rotated the corner triangles of the Whirlpo0l block.

Again, I have “sewn” a very smal quilt out of four Windblown Square blocks in order to illustrate what happens:

© 2012 by Heike Scharmann

There you can see that by joining the blocks, a second pattern emerges: the blue pinwheel in the middle.

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