I would like to create bubbles rising.
The speed of the bubble depends on the size of the bubble.
xscale and yscale of bubble equals a random number between 1 to 10.
diametre = xscale (or yscale obviously seen as they are round)
speed = 10/diametre
I would like the bubbles to load in random posistions along the line
x start = 60 x end 760 (meaning the line is 700 pixels long, meaning the bubbles can load anywhere on this line)
y = 190
Thanks 
