Sorry for reposting, but if u want to just get things done and not challenging urself or being curious, a QUICK FIX, will be:
1. Run the script in background
# ./yourShellScript.sh &
2. That's it. If you wanna stop it, u can just find the PID, using:
# ps aux | grep yourShellScript.sh
3. Kill the pid:
# kill -9 PID-OF-YOUR-SHELL-SCRIPT