Lab Assignment for Spirals1: Complete this Scratch program

1. Draw a spirals of squares shapes - press 's', triangles - press 't', and hexagons - press 'h'

2. Steps to build this program:
   • when t key pressed
     • broadcast clearScreen
     • set sidelength to 20
     • repeat 20
       • broadcast drawTriangle and wait
       • change sideLength by 5

   • when I receive drawTriangle
     • repeat 3
       • move sidelength steps
       • turn 120 degrees

   • when h key pressed
     • broadcast clearScreen
     • set sidelength to 20
     • repeat 15
       • broadcast drawHexagon and wait
       • change sideLength by 5

   • when I receive drawHexagon
     • repeat 6
       • move sidelength steps
       • turn 60 degrees