If you’re just tuning in make sure to check out Step 1’s blog post from last week.
Make half-square triangle units from your 4” squares.
To do this layer your MEDIUM fabrics on your LIGHT fabrics and then layer your DARK fabrics on your LIGHT fabrics. Once the triangle units are created, trim square to 3.5” x 3.5”. Press seams toward the MEDIUM or DARK fabric. You should have 50 light/medium units and 50 light/dark units.