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to t1
repeat 2[repeat 4[fd 60 rt 90]fd 60 rt 90 fd 60 lt 90]
end

to t2
repeat 4[lt 90 fd 50 rt 90 fd 50 rt 90]
end

to t3
repeat 4[fd 60 rt 90]fd 60 rt 30 repeat 3[fd 60 rt 120]
lt 30
end

to t4
repeat 4[fd 30 bk 30 rt 90]
bk 30 rt 90 fd 30 lt 90
repeat 4[fd 30 bk 30 rt 90]
end