Push sides to push block?

Inspired from Zelda, its a crate that is supposed to be able to move to the right,left,front,back.

But for some reason it only moves front, and back.

canPush = true
script.Parent.Touched:connect(function(hit)
    if canPush == true then canPush = false
    local back = Vector3.new(script.Parent.CFrame.X + script.Parent.Size.X/2, script.Parent.Size.Y, script.Parent.Size.Z)
    local front = Vector3.new(script.Parent.CFrame.X - script.Parent.Size.X/2, script.Parent.Size.Y, script.Parent.Size.Z)
    local right = Vector3.new(script.Parent.Size.X, script.Parent.Size.Y, script.Parent.CFrame.Z - script.Parent.Size.X/2)
    local left = Vector3.new(script.Parent.Size.X, script.Parent.Size.Y, script.Parent.CFrame.Z + script.Parent.Size.X/2)
    local frontmag = (front - hit.Position).magnitude
    local backmag = (back - hit.Position).magnitude
    local leftmag = (left - hit.Position).magnitude 
    local rightmag = (right - hit.Position).magnitude
    if frontmag < backmag and frontmag < rightmag and frontmag < leftmag then
        for i = 1, 40 do
        wait()
        script.Parent.CFrame = script.Parent.CFrame - Vector3.new(-0.1, 0, 0)
        end
    elseif backmag < frontmag and backmag < rightmag and backmag < leftmag then
        for i = 1, 40 do
        wait()
        script.Parent.CFrame = script.Parent.CFrame + Vector3.new(-0.1, 0, 0)
        end
    elseif rightmag < frontmag and rightmag < backmag and rightmag < leftmag then
        for i = 1, 40 do
        wait()
        script.Parent.CFrame = script.Parent.CFrame - Vector3.new(0, 0, -0.1)
        end
    elseif leftmag < frontmag and leftmag < backmag and leftmag < rightmag then
        for i = 1, 40 do
        wait()
        script.Parent.CFrame = script.Parent.CFrame + Vector3.new(0, 0, -0.1)
        end
        end
    wait(1)
    canPush = true
    end
end)