Why this not running?

Question

https://code.sololearn.com/cbGf8Eutmm2T/?ref=app

Answer 1

because turtle module cannot work in sololearn context (text only output, execution on sololearn servers)

Answer 2

Try learning about indentation

for i in range(255*2):
colormode(255)
if i < 255//3:
r+=3
elif
...

Answer 3

Try this, from Kirk Schafer https://code.sololearn.com/W7Peu9IQ6KkE

Answer 4

Thank you visph..... I didn't know that

Answer 5

you can run turtle in web (html/css/js) code playground context, but this require some js knowledge to use library such as skulpt wich emulate less or more python ^^

however, Simba is right: your code is not valid as lacks of indentation ;P