Green Screen

Hello! A while back I made a green screen with javascript and the canvas. I thought that it would be a cool challenge idea. In my program, I can select a certain color I want to search for, and then replace it with a corresponding pixel from another image. It would be interesting to see how you would conquer this task.

No repository files, tests, or entry points are named. Start by reviewing the issue's green-screen description and the existing suggestion format; the finished challenge should let a participant select a color and replace matching pixels with corresponding pixels from another image.

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