local yaw = 0

local side = "left"
local amount = 1

hook.Add("CalcView", "SPIN", function(ply, origin, angles, fov)

    local focus_point = ply:GetEyeTraceNoCursor().HitPos

    if side == "left" then
        origin = origin + angles:Right() * amount
        side = "right"
    elseif side == "right" then
        origin = origin - angles:Right() * amount
        side = "up"
    elseif side == "up" then
        origin = origin + angles:Up() * amount
        side = "down"
    elseif side == "down" then
        origin = origin - angles:Up() * amount
        side = "left"
    end

    angles = (focus_point - origin):Angle()

    return {
        origin = origin,
        angles = angles,
    }
end)