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Draw two parallel vertical lines on a piece of paper. Visualize these as a left side and a right side of an upright ladder. The left side will be called the "hot" wire and the right side will be the neutral wire. The cross pieces in this diagram will be the rungs of the ladder. Draw a line from the left hand side of the ladder to the right hand side of the ladder. Insert into this rung one of the two light bulbs. Below this rung copy the above rung with the second light bulb. Into this second rung insert a switch in series with the second bulb. When the complete circuit is powered on the first bulb will light and depending on the position of the switch in the second rung, the second bulb will light if the switch is closed. If the switch in the second rung is open the bulb will not light.

This will be the drawing that your scenario suggests.

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Q: How do you draw aparallelciurcut with 2 light bulbs and a closed switch that controls one light?
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