BASH script to record Android display and download/delete the video

AndroidRecord.sh

#Check if an argument was supplied
if [ -z "$1" ]
  	then
    	echo "No argument supplied, please provide video name"
	else
	   	# start recording
		adb shell screenrecord --bit-rate 6000000 /sdcard/$1.mp4 &

		# Get its PID
		PID=$!

		# Upon a key press
		read -p "Press [Enter] to stop recording..."

		# Kills the recording process
		kill $PID

		# Wait for 3 seconds for the device to compile the video
		sleep 3

		# Download the video
		adb pull /sdcard/$1.mp4

		# Delete the video from the device
		adb shell rm /sdcard/$1.mp4

		# Kill background process incase kill PID fails
		trap "kill 0" SIGINT SIGTERM EXIT
fi