how to fix colon error with if statement in python : i have a syntax error i cant see it here is my code need answer asap (PYTHON)

 
i am creating a piece of code which allows the user to enter a correct pin in python i tried adding an if statement and i keep getting a syntax error on the colon

this for a python test i have tried re indenting and removing the colon nothing has seemed to work 

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[problem with colon recurring syntax error][1]

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 i expect it ti print IF PIN IS CORRECT PRINT WELCOME TO NORTHERN FROCK


  [1]: https://i.stack.imgur.com/NmMtH.png