def do_circle(self, arg):
"""Draw circle with given radius an options extent and steps: CIRCLE 50"""
circle(*str_to_tuple(arg))
def do_goto(self, arg):
"""Move turtle to an absolute position with changing orientation. GOTO 100 200"""
goto(*str_to_tuple(arg))
def do_right(self, arg):
"""Turn turtle right by given number of degrees: RIGHT 20"""
right(*str_to_tuple(arg))
def do_left(self, arg):
"""Turn turtle left by given number of degrees: LEFT 90"""
left(*str_to_tuple(arg))
def do_forward(self, arg):
"""Move the turtle forward by the specified distance: FORWARD 10"""
forward(*str_to_tuple(arg))