Supplies needed: old tray, painter's tape, and paint.
I forgot to take a picture of my tray before I started painting but mine looked pretty much like the one pictured except is was really old and scratched up. I'm sure you can find a thrifted one pretty cheap.
This is how I made this one:
I painted the entire tray 2 coats of white. Let it dry. Then I taped off the chevron stripes. Make sure you use painter's tape so that you don't accidentally pull up your paint. I just used the width of the tape to space the lines but it might also be fun to have the stripes different widths. Paint 2 coats for the stripes. Remove the tape before the paint is completely dry.
Enjoy your new tray!!