2-level Tower:

2′ x 3′ x 1/2′ + 4′ x 6′ x 1′

Stick together + mark it with notches and numbers

Cut along the edge.

Copy to pattern paper and add 1/2 inch seam allowance

3-level Tower:

6′ x 8′ x 1′  +  4′ x 6′ x 1′   +    2′ x 3′ x 1′      (side 1′)(bottom 1′)

Stick together

Cut it

Transfer to muslin with all marks