Classic Color Lines 1998

On this square grid, there are some random color balls in normal status and three small ones which could be replaced by a big one when you drag another color ball into. If you don't, the small color ball will grow and become a big ball, take the place and fill up grid. Your mission is to rearrange the color balls to form a line of same color with at least 5 color balls in a line (row, column, cross). Then you have a color line, all the balls will explode and the grid will be clean. Do it again as much as possible to get score.