How to put this into a script?

My friend gave me a example of his gun script which is part and I don't know how to piece it together.

weld33.C1 = CFrame.new(-0.75, -0.4, 0.35) * CFrame.fromEulerAnglesXYZ(math.rad(-90), math.rad(-15), 0.02) wait(.02) weld33.C1 = CFrame.new(-0.75, -0.4, 0.35) * CFrame.fromEulerAnglesXYZ(math.rad(-90), math.rad(-15), 0.04) wait(.02) weld33.C1 = CFrame.new(-0.75, -0.4, 0.35) * CFrame.fromEulerAnglesXYZ(math.rad(-90), math.rad(-15), 0.06) wait(.02)