1) Cut 2x2 strips to width of shower stall
2) Line them up and place two 2" pieces of the 1x2 between each slat for spacing
3) Once desired dimensions have been achieved, cut two pieces of 1x2 to span length of slats
4) Using wood glue and screw or nails attach two cross pieces to bottom of slats.
Check out more fun DIY projects at the Home & Family Pinterest Page