Chat App Attempt

Please help me with some advice, this was the most detailed challenge I have attempted to date. I really struggled with the background pattern, I could not seem to get the 2 patterns to exceed the viewport to achieve the radius passing the edge. Also I struggled trying to get the pattern on the right to scale because i was trying to use height but it would just increase size down the page, this caused me alot of trouble and I found a work around but it has to be the worst work around ever haha! any advice would be awesome p.s Please HELP ME!!!!