Draw pixel 2

Create a window and draw a pixel in it, subject to the following:

Draw pixel 2 is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

Task

1.  the window is 640 x 480
2.  the color of the pixel must be yellow (255,255,0)
3.  the position of the pixel is random