Default value: 0

Legal values: all real numbers

setDeltaScale() changes the value of Scale by value per second. setDeltaScale works with different types of objects just like setScale() does. Here's an example:

setDefaults()
setScale(10)
setDeltaScale(-8)
test <- createCircles(1,0)

Here we have a circle named test. When it is created, its Scale is 10, so it's 20m across. After one second, it's Scale is 2. After another second, it's Scale is -6, and so on until DeltaScale is changed (using modifyDeltaScale()) or test is deleted.