Making a turtle mine with rednet

This is the code i have setup for my Turtle i want to mine, and then return to the surface, i know its bad but im just starting ;P

Turtle-
rednet.open("right")
rednet.receive()
if text = "dig" then
turtle.digDown 30
(How do i make it go back up also?)

Computer-
rednet.open("right")
rednet.broadcast("dig")

I use the turtle program before computer program

Your going to run into a couple of issues, I've made some corrections and added coding to return to the surface.

rednet.open("right")
local id, text = rednet.receive() -- need to capture the output from the receive in some vars
if text = "dig" then
for x=1, 30 do --repeats code 30 times
  turtle.digDown() -- can only go 1 block at a time thus the for loop
  turtle.down() -- move down after digging
end
for x=1, 30 do
  turtle.up()
end
end

rednet.open("right")
local id, text = rednet.receive()
if text = "dig" then
for x=1, 30 do
turtle.digDown()
turtle.down()
end
for x=1, 30 do
turtle.up()
end
end

With that coding I get the error "bios:206: [string "p"]:3: 'then' expected
there are also 2 spaces before each line with "turtle"

Sorry I didnt notice = syntax is a = 1 or if a == 1

= to assign the value
== to check a value

so change

if text = "dig" then

to

if text == "dig" then

Now it can dig down, but wont return to the surface

Hmm it should work, only thing I can think of is trying to move one of the ends up. Might be causing a logic issue.

I'm not to where I can test this unfortunately.

rednet.open("right")
local id, text = rednet.receive() -- need to capture the output from the receive in some vars
if text = "dig" then
for x=1, 30 do --repeats code 30 times
  turtle.digDown() -- can only go 1 block at a time thus the for loop
  turtle.down() -- move down after digging
end
end
for x=1, 30 do
  turtle.up()
end

Works perfectly, thanks for all the help :P/>/>

Is there a way to make turtles mine for a specific type of block or resource?