Steve is in an abandoned mine, his eyes filled with excitement, torch clenched in his hand. He is surrounded by forgotten treasures, from the deep-brown dirt that lines the floor all the way up to the grays and browns of the rock walls. A rusted-out cart sits in the corner, a cobweb draped across its surface. To give the page even more depth and detail, you could add in small details such as small flecks of orange rust. Also, brushes of lighter brown and grey can be used to suggest faded elements in the mine, such as old markings and signs. You could add a touch of green to represent the moss and lichen that sometimes grow on rocks and aging equipment, while a hint of light blue delineate the shadows that Steve is casting in the near darkness. Finally, you could use charcoal to detail Steve's clothing and facial features.