Flood-fill an area of blocks with a replacement color to connect three or more same colored blocks. Instructions: Flood-fill an area of blocks with a replacement color to connect three or more same colored blocks. To select a start flooding node click with your mouse on a target block. All blocks which are connected to the start node by a path of the target color will be changed to the replacement color. The flooding will be extended to four directions (up, down, left, right). After the flooding is finished, there must be at least one same colored block connected to the flooded area to get points. More blocks flooded and connected to the flooded area at once - much more points for you!