Simplify the following text for a Grade 4 native English-speaking person.
Original: Traditionally , the candle and candle holders were made in the same place , so they were appropriately sized , but international trade has combined the modern candle with existing holders , which makes the ill-fitting candle more common .
Simplified: If the flame is kept on the candle long enough , the candle will slowly get shorter and shorter until it is gone . The fire on a candle can be put out by blowing air on it .