Script won't print out change in BoolValue's value??

while true do game:GetService("RunService").Heartbeat:Wait() print(script.Parent.Value) end

Ok so that script is inside of a boolvalue. When I run the game, it constantly prints out false, so then I change the boolvalue's value to true through it's properties (while still in studio play mode) and it still prints out false. Is there something I don't know about or that I'm doing wrong?