Classicly

The problem so engrossed him that he scarcely noticed the passage of time. Periodically he would get hungry or thirsty. It was a simple matter to press the proper buttons and hurriedly gulp the foods that appeared. Whenever he tired mentally, he tilted his chair to a comfortable position and slept.

And as the days passed, the facsimile took shape under his genius. Each separate world became a duplicate of its original. Mountains were born; the seas dashed at first against shores that were bare and bleak; then the magic of plant life on all the varied worlds assumed a rainbow of colors. The ooze of the oceans began to crawl. On land and in the air animals appeared.