This pattern has only two lines: a color and off.
The result if played on repeat is a flashing.
echo "making pattern"
blink1-tool -m 500 --rgb ff00ff --setpattline 0
blink1-tool -m 500 --rgb 000000 --setpattline 1
The --play
commands takes three args: play/stop (1/0), start position, end position.