Information: There's more than one way to draw a square:
LT or RT: repeat 4[fd 20 rt 90] or repeat 4[fd 20 lt 90]
SETH: seth 0 fd 20 seth 90 fd 20 seth 180 fd 20 seth 270 fd 20
SETXY: SETXY 0 20 SETXY 20 20 SETXY 20 0 SETXY 0 0
