How do I move opposite?

Hello

I have two strikers, if I slide one striker to the right then the other striker should move opposite to other.

For example, if my striker is 100 pixels to the right from the center of the layout, the other striker should be 100 pixels to the left.

set a global variable for centerX

do you want them to move like a foosball table? one goes right, the other goes with it.

like a foosball table. 0X000c0X000 00X00c00X00 0000Xc0000X

striker1.X-centerX= striker2.X C=500 S1=800 S2=800-500=300

striker1.X-centerX= striker2.X C=500 S1=1000 S2=1000-500=500

or.. like a mirror? one goes right, the other goes left? X0000c0000X

centerX*2-striker1.x

striker2=0 c=500 striker1=1000

0X000c000X0

st2=100 c=500 st1=900

hope i mathed this out ok. i assume striker1 is right of center( as you said he has 100 pixels)