A New Type Of Gradient ! (Updated)

You can after now draw your gradients easily. Select 4 Colors and draw a 4-colored gradient rectangle, you will see a new type of gradient you have never seen it before, you can use it for gradient color pallets (for example), i wrote a very little amount of code, to do this. in addition, i have wrote an extra code that i hadn't use it, you can use it in your gradphics programs, like triangular gradient, and polygonal gradient