I built this simple tool to nudge me to blink more often because my eye-sight deteriorated fast soon after I started learning to code. Help needed: currently

I built this simple tool to nudge me to blink more often because my eye-sight deteriorated fast soon after I started learning to code. Help needed: currently I'm only using color change to nudge users to blink more. I don't have any biology background but there should be more effective ways. Love to brainstorm together. Repo is here: https://github.com/GoodluckH/blink-more https://github.com/GoodluckH/blink-more