How do I randomly position four sprites?

Hi, I want to place 4 sprites on four positions randomly without overlapping.

x y cordinates:

100-130, 160-130,

130-180, 190-180

How can I do it?

This is how I would do it in pseudo code -

Global var=0

Pick a random sprite, set object instance var to global var. Add 1 to GV

Repeat 3 times.

You then have 4 sprites with a variable set that is 0, 1, 2 or 3.

Then you relate the instance variables to the co-ords. If 0 then set position to 100,130, if 1 then set to 160,130 etc