Algodoo

Slowly fades from red to green.


Script:
(e)=>{
e.this.color = [e.this.color(0) - 0.01, e.this.color(1) + 0.01, e.this.color(2), e.this.color(3)]; e.this.color(0) <= 0 && e.this.color(1) >= 1 ? {e.this.color = [0, 1, e.this.color(2), e.this.color(3)]} : {} }

This takes the first value of the color and continually subtracts 0.01 from it until it gets to or below 0 and then it stops subtracting. This also takes the second value of the color and continually adds until it gets to or above 1.