Adding a line to the right of the box means that the calculation doesn't reset itself overy time the button is clicked, but adds it on top, and outputs it as a sum...This is supposedly called 'counting behaviour'

Linking up the 'metro 500' object meant that every so often, the calculation was redone and the number in the bottom box increased.
Changing the number value next to 'metro' made the calculation recurrence speed slower and faster.
Changing to '2000' made it slower
Changing '200' made it a lot faster
If you change the value to 'o', you stop the counting behaviour completely otherwise it keeps on going...


