The Code

The door was locked and there was a keypad next to it.
He'd been given the code and typed it in.
The pad glowed red and emitted a low beep.
He tried the code again and the reult was the same.
He looked at the piece of paper on which the code was written. He'd seemingly entered it correctly, but the 1 looked like it could be a 7.
He tried again, but with a 7 instead of the 1.
The corridor lit up red and a loud klaxon sounded.
A cage dropped from the ceiling and trapped him.
He wasn't going to make it to the toilet.