Make a triangle

create a number, resize and center

Create a grid of 24. 10+10+4

Change the number for 1 to 24

Hide layer and create rectangle. Combine/Unite

Duplicate layer. Create rectangle-Subtract and duplicate

Add rectangle to use as backer

Create Shape to use for legs. create and subtract rectangle. Duplicate to make 3 legs

subtract notch for legs and duplicate panel

Assemble together and glue