After standing in the shop looking at the bottle the old man had given him, Zack puts the potion in his pocket and headed home.
When he finally got home, Zack rushed to his bedroom and locked his bedroom door. Taking out the bottle he examined it. It didn't have any distinct feature. "Ah, to hell with it" he said, gulping the contents down with a single swallow. Zack was suddenly struck with a pain that felt like a truck just went though his chest. When it was over, he wondered if it had worked.
"Well, lets test it out." He said with a slight excitement. "My bedroom walls are painted green". Suddenly the walls turned from their pure white to deep green. "It worked!"Zack yelled with excitement.
Suddenly Zack remembered what the old man in the store had said. "Well" he said clapping his hands with a grin on his face. "What should I do first.