Help with recoil system

[greentumbleweed]

function rotateCameraRight()
        if getKeyState( "mouse1" ) == false then
            removeEventHandler("onClientPreRender", root, rotateCameraRight)
        else
            setTimer (function()
            setPedCameraRotation(localPlayer, -(getPedCameraRotation(localPlayer) + 0.08))
            setPedCameraRotation(localPlayer, -(getPedCameraRotation(localPlayer) - 0.08))
        end, 50, 1 )
            setCameraMatrix (x, y+0.8, z, lx, ly, lz)
            setCameraTarget ( localPlayer )
        if not isTimer(timer_right) then
            timer_left = setTimer ( timer_l, 850, 1 )
        end
    end
end

function timer_l()
    removeEventHandler("onClientPreRender", root, rotateCameraRight)
    addEventHandler("onClientPreRender", root, rotateCameraLeft)
end

function rotateCameraLeft()
        if getKeyState( "mouse1" ) == false then
            removeEventHandler("onClientPreRender", root, rotateCameraLeft)
        else
            setTimer ( function()
            setPedCameraRotation(localPlayer, -(getPedCameraRotation(localPlayer) - 0.08))
            setPedCameraRotation(localPlayer, -(getPedCameraRotation(localPlayer) + 0.08))
        end, 50, 1 )
            setCameraMatrix (x, y-0.8, z, lx, ly, lz)
            setCameraTarget ( localPlayer )
        if not isTimer(timer_left) then
            timer_right = setTimer ( timer_r, 900, 1 )
        end
    end
end
function timer_r()
    removeEventHandler("onClientPreRender", root, rotateCameraLeft)
    addEventHandler("onClientPreRender", root, rotateCameraRight)
end

function addEvent()
local weapon = getPedWeapon(localPlayer)
    if (weapon==34) or (weapon==31) or (weapon==30) or (weapon==6) then
        addEventHandler("onClientPreRender", root, rotateCameraRight)
    end
end
bindKey("mouse1", "down", addEvent)

bind = true

so i made this code trying to make something similar to h1z1 horizontal recoil, but it only goes left. I need it to go left or right randomly but never repeat left or repeat right.

[IIYAMA]

local rotationDirection = "right"

-- function scope ...

if rotationDirection == "right" then
	rotationDirection = "left"
	setPedCameraRotation(localPlayer, -(getPedCameraRotation(localPlayer) + 0.08))
else
	rotationDirection = "right"
	setPedCameraRotation(localPlayer, -(getPedCameraRotation(localPlayer) - 0.08))
end

-- end