The students set up the sports venue and pulled a string of balloons on the rostrum, and arranged them in the order of 1 red balloon, 2 yellow balloons, 3 blue balloons, and 4 green balloons. Please do the math, the 50th one What color is the balloon?
同学们布置运动会场，在主席台上拉了一串气球，按1个红气球、2个黄气球、3个蓝气球、4个绿气球的顺序排列着，请你算一算，第50个气球是什么颜色？
<result>50</result>