Custom Gmod Bot

bot = nil
comd = nil
local plyr = player.GetHumans()[math.random(1,#player.GetHumans())]

function mainbotfunc(ply,cmd)
    if ply:IsBot() then
        comd = cmd
        bot = ply
        local botpos = ply:GetPos()
        bot:SetModel("models/player/phoenix.mdl")
        ply:SelectWeapon("none")
        ply:Give("none")
            local plypos = plyr:GetPos()
            local yaxis = plypos.y - botpos.y
            local xaxis = plypos.x - botpos.x
            yaw = math.deg(math.atan2(yaxis,xaxis))
            comd:SetViewAngles(Angle(0,yaw,0))
            if plypos:Distance(botpos) > 9999 then
                comd:SetForwardMove(1000)
                comd:ClearMovement()
            end
            if plypos:Distance(botpos) < 80 then
                comd:SetForwardMove(-1000)
                comd:ClearMovement()
            end
        end
        local plyr = player.GetHumans()[math.random(1,#player.GetHumans())]
end
hook.Add("StartCommand","mainbotfunc",mainbotfunc)