Graphics 640,480;Repeat;c:+10;Cls;For a=0 To 480;For b=0 To 640;Plot b*a-c,a;Plot 640-b*a+c,a;Next;Next;Flip;Until KeyHit(KEY_ESCAPE)
Prepare yourself for face-melting Virtual Reality(tm) graphics so real you'll swear you are straped to a TRON Light Cycle battling for your life against the MCP!
135 bytes (enough room left to add a Disc battle sequence as well!)