You would have two tags for each rectangle that define that start position and the length.
Rect1pos = 0
Rect1len = 1
Rect2pos = Rect1pos + Rect1len
Rect2len = 8
Rect3pos = Rect2pos + Rect2len
Rect3len = 1
Rect4pos = Rect3pos + Rect3len
Rect4len = 3
Rect5pos = Rect4pos+ Rect4len
Rect5len = 4
Rect6pos = Rect5pos + Rect5len
Rect6len = 3
Replace the values with tags for the lengths and you have bar graphs that will move and grow/shrink.