Here is my code:

def readnumber

check$4=$ False

check$7=$ False

go

if pumpkin

check$4=$ True

go

if pumpkin

check$7=$ True

left

go

go

if check$4$

return $4$

if check$7$

return $7$

else

return $1$

Result:

The robot turns left and crashes. The solution given is not correct