The Green Mile (1999)

The story about the lives of guards on Death Row
leading up to the execution of a black man accused of child murder and rape, and who has the power of faith-healing.
Death Row guards at a penitentiary, in the 1930's, have a moral dilemma with their job
when they discover one of their prisoners, a convicted murderer, has a special gift.

Director: Frank Darabont
Writers: Stephen King (novel)
Stars: Tom Hanks, Michael Clarke Duncan and David Morse

In the movie... it was the green tiles that you walked on to the electric chair...