Edited again

Miner receiving
rednet.open("right")
i = 0
while true do
event, par1, par2 = os.pullEvent()
if event=="rednet_message"then
if par2 =="go" then
repeat
turtle.dig()
turtle.forward()
turtle.digUp()
turtle.turnLeft()
turtle.dig()
turtle.up()
turtle.dig()
turtle.turnRight()
turtle.turnRight()
turtle.dig()
turtle.down()
turtle.dig()
turtle.turnLeft()
i = i+ 8
until par2=="stop"
end
else if par2=="stop" then
 print("Mining has been stopped by a user")
end
end
end

computer sending information

rednet.open("left")
rednet.send(3,"go")
input = read()
if input == "stop" then rednet.send(3,"stop")
end