Adding option in Script to BUY/SELL With layering and two TP's

I want the following to be possible as extra option

When selecting the option BUY/SELL with two TP'S I want that

1. The order is started within the range included layering with TP 1 and SL 

2. When TP 1reached, the order should change the SL to TP 1 and set TP 2 as TP

In this way i am not loosing any money

example to test 

XauUsd Sell Now @ 2775 - 2778

Sl:2780

Tp1 :2773

Tp2 :2770