This is a post for newbie quilters. Here's how to make a string quilt block. Use your 6" square ruler. Don't have a 6"? That's okay, use another size. Or another shape.
You might want to make the center strip (above) using the same fabric in all the blocks so that you get a lattice effect. Make some blocks and play with them on your design wall.
I like the yellow flower in the upper corner of this block. All the strips don't have to be the same width. The strips are 1 1/4"- 1 1/2" wide. But cut them whatever widths you like. This is a very casual method.
You might use sashing between the blocks. Maybe add an outer border. So many possibilities!