trying to move image upwards like a curtain with scroll.

[Sheraz Awan]

So i am trying to move a curtain effect. i want that the below section stays pinned and the curtain starts going up. but the issue is that its cutting down the image when it goes up and it also adds a white background even though i m using a png for curtain. 

See the Pen NWYKdqp by Artyomawan (@Artyomawan) on CodePen

[GreenSock]

It's difficult for me to understand exactly what effect you're going for, but maybe you meant to do this?: 

See the Pen ZExzeRG?editors=0010 by GreenSock (@GreenSock) on CodePen

 

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