Why isn't this Animation Working?

I've created a tool and when I equip it, it doesn't run.

function Animation(left,right)
    left.CFrame=CFrame.new(1,1,1)*CFrame.Angles(0,0,math.rad(-30)) -- Nothing big, just arm test
    right.CFrame=CFrame.new(1,1,1)*CFrame.Angles(0,0,math.rad(30))
end

script.Parent.Equipped:connect(function()
    local chr=script.Parent -- the character(tool's parent)
    left_arm=chr:WaitForChild'Left Arm'
    right_arm=chr:WaitForChild'Right Arm'
    Animation(left_arm,right_arm)   
end)

f.y.i. Nothing in the output,Not Running.I don't know anything about Custom Animations.