import turtle as t

zel = float(input("What is your Zel: "))
for i in range(4):
  t.fd(zel)
  t.lt(90)
t.done()

import turtle as t

zel = float(input("What is your Zel: "))
for i in range(4):
  t.fd(zel)
  t.lt(90)
t.done()
