An Advent wreath's evergreen boughs form a circular shape, symbolizing continuous life, with four candles to represent the four weeks of Advent. Advent wreaths sometimes contain holly to remind Christians of the thorns in Jesus' crown when he was crucified. The four candles represent the 4,000 years between Adam and Eve and the birth of Christ during which mankind waited for the arrival of Jesus. A candle on the wreath is lit each Sunday during the season of Advent to signify the entrance of Christ, the light, into the world. There are three purple candles and one rose-colored candle on an Advent wreath. The purple candles are lit over the course of the first two and fourth Sundays of Advent. These candles represent prayer, penance and preparation for the coming of the Lord that each person is expected to undertake during the Advent season. The rose candle is lit on the third Sunday, Gaudete Sunday, and it represents joy. (Gaudete is latin for "rejoice.") Gaudete Sunday is seen as a day of rejoicing because it marks the midpoint of Advent. The candles are lit progressively throughout Advent to show the hope and expectation of the first coming of Christ and the anticipation of the second coming where Jesus is to judge the living and the dead.