Watching "Code a 2D Game Engine using Java" and stuck

Hi there. I’m watching “Code a 2D Game Engine using Java”, and I’m stuck at this part.

When I run my program, my window is white, not red. However, when I close the window, it flashes red as it’s closing. My code looks the same as Gabe’s.

Does anyone know what I might be doing wrong?

psot your code, then maybe we can be able to help :slight_smile:

I had actually just forgotten curly braces on my while loop. It works now. Thank you!