How would you make a new rect transparent

Getting Started Newbie Questions
#1

Is there a certain number with set fill color to make a rect invisible?

#2

You can use:

 

object.isVisible = false -- or object.alpha = 0 -- or object:setFillColor(0,0,0,0)
#3

You can use:

 

object.isVisible = false -- or object.alpha = 0 -- or object:setFillColor(0,0,0,0)