How to find the position between x1 and x2?

Question

Mathematics

There are 3 layers in the flash,
take.ms/659s8
1st layer (Second Free)
2nd layer Delimeter(Red bar)
3rd layer (In honor of 10....sprite...)
Aim to place 2nd layer between (1 and 2)
T2 = 1st layer
D = 2nd layer separator
D_x = (T2._x + T2._width + D._width)
And my strip is attached to the first layer, but how can I get the strip to be between 2 layers T2 - T3 and was dependent on T2 and T3?

Answer 1

this is the darkness in your head.
On the topic, there is a stage size (stage.width), cling to it and its dimensions, for example

Answer 2

The issue was resolved by...