Help, I want my Turtle to Go to Co-Ords I say and Build Then Return Home

I found a program which you can tell the turtle to go to a set of co ords using a computer as it sends them to the turtle, I have been able to get that working, I'm having the problem where I want it to then build something when it gets there and then when its done return home

Here is the page about the Co Ords http://www.computerc...__fromsearch__1

and here is the page about what I want it do when it gets there (its to build a house) http://www.computerc...e-build-script/

now what I want is for it to collect the items it needs to build the house from a chest below it if its possible,

I bet its as simple as adding a then or if command but I'm not very clued up on CC

Thanks

Zavii

turtle.suckDown()
rednet.receive()