A Green Clue

Your hint kept buzzing in my head. Green mourns? I crept down from the high shelf. Pop, pop. My feet anchored on the smooth desk right in front of that motionless green companion. Next to it sat the little green pencil sharpener, quiet under the dim lamp. I stretched my arm down into its clear chamber. Plink. My suction cup nudged a tiny steel shaving blade inside. It caught the night light and sent a sharp silver flare across the floor. Thirty sparks might take a while, but that was one bright gleam.