How do I make a tracker point towards a player? Clip included

I'm trying to create a tracker that leads to a player, but I'm having trouble with offsetting the bar between the local player, and target. The green bar should becomes invisible when the player is not facing the direction of the target.

Here's how it currently functions and the entire script.

https://vimeo.com/398960643

local smoothness = 30/3

wait(1)

local follow = game.Workspace.King1
local player = game.Players.LocalPlayer
local camera = workspace.CurrentCamera

local dev = script.Parent

local lastY = 0

function restrictAngle(angle)
    if angle < -math.pi then
        return angle + math.pi*2
    elseif angle > math.pi then
        return angle - math.pi*2
    else
        return angle
    end
end

while true do
    local delta = wait(1/30)

    local look = camera.CoordinateFrame.lookVector
    local look = Vector3.new(look.x, 0, look.z).unit
    local lookY = math.atan2(look.z, look.x)

    local difY = restrictAngle(lookY - lastY)
    lookY = restrictAngle(lastY + difY*delta*smoothness)
    lastY = lookY


        local XPosOffset = (follow.HumanoidRootPart.Position.X)
        local ZPosOffset = (follow.HumanoidRootPart.Position.Z)

        playerLocation = math.pi * XPosOffset/ZPosOffset

        bar = dev.Middle
        rot = restrictAngle(lookY - playerLocation)
        if math.sin(rot) > 0 then
            local cosRot = math.cos(rot)
            local cosRot2 = cosRot*cosRot

            bar.Visible = true
            bar.Position = UDim2.new(0.5 + cosRot*0.6, bar.Position.X.Offset, 0, 3)

            local total = (follow:WaitForChild("HumanoidRootPart").Position + player.Character:WaitForChild("HumanoidRootPart").Position).Magnitude
            local magnitude = (follow:WaitForChild("HumanoidRootPart").Position - player.Character:WaitForChild("HumanoidRootPart").Position).Magnitude

            bar.Size = UDim2.new(0, 10, 0.1, 0)

        else
            bar.Visible = true
        end
    end