Now, if you want to catch both transitions!
First scan with I going on...
I is on and Old is not on so Jog goes on
I is on so Old goes on
Next scan(s)...
I is on and Old is on so Jog goes off
I is on so Old stays on
First scan with I going off...
I is off and Old is on so Jog goes on
I is off so Old goes off
Next scan(s)...
I is off and Old is off so Jog goes off
I is off so Old stays off
Result: Jog is only on for one scan, each time I changes state!
Usage: Imagine I is a toggle switch - Jog indicates every time that I changes state
