I am trying to use the expression that was provided in this post in order to make a row of shapes change color in a cascading order. I was originally looking for a way to copy one layers color change key frames with an expression that adds a delay for each shape so there is a cascading appearance. Where does the color red come from in this expression? I am trying to change the expression so that it will have the colors I need but I don’t know what part of the expression is controlling the color itself. Thanks for your help.