</  Monster
    var/mob/target
    var/SightRange=5
    var/AttackRange=1
    var/WanderDelay=5
    proc/Wander()
        for(var/mob/m in oview(src,SightRange))
            if(!target) target=m
            if(get_dist(target,src)<get_dist(target,m)) target=m
        if(target)
            if(target in oview(src,AttackRange))
                attack() //Assumes there is a mob/proc/Attack() defined. Change as needed
                spawn(WanderDelay) Wander()
                return
            else    
                step_to(src,target)
                spawn(WanderDelay) Wander()
            return
        else
            step_rand(src)
            spawn(WanderDelay) Wander()
            return
    proc/Fight(mob/M)
        var/damage = rand(1,10)
        M.HP -= damage
        M << "[src] attacks you for [damage] damage!!"//This tells "M" they have been attacked
        src<<"You attack [M] for [damage] damage!!" //This tells you that you atttack M for how many damage
        DeathCheck(M) // Run Death Check>

<b>:</b>

tried to use this code and it didn't work with my game btw i got this code from another topic