Increasing the speed of randomly falling objects

I want to increase the speed of randomly falling objects after the player has scored 300 points im using physics to make them fall can anyone help me i am stuck
Show some code for it guys

if score is equal to 300 then randomFallingObject.gravityScale = 50 end

Thanks a lot

https://marketplace.coronalabs.com/asset/balloon-pop-game-templates

if score is equal to 300 then randomFallingObject.gravityScale = 50 end

Thanks a lot

https://marketplace.coronalabs.com/asset/balloon-pop-game-templates