You can make it where players need to hold down the 1 key, and you have to hold down the 1 key as you highlight different strands of grass to help them grow. If you stop just 1 split second over the course of 8 hours, you have to start over. Each time you do this you get 1 light shard, and you need 90 light shards to complete it.
I see someone's been introduced to Desert Bus.