draw

Hello! I would love to know how can i draw circles in random positions but without them getting in the way of each other. I want them to be seperated at least 50 pixels from each other but without them leaving the boundaries of the Picture Box. Please help me out with this i would be so...

Hi I want to create function to draw circle put using this : nx = x + r *Math.Sin(th * 22 / 7 / 180); ny = y + r2 *Math.Cos(th * 22 / 7 / 180); and draw them in picture box using SetPixel method.