Dark lines

Dark lines is a well-known anti stress game. It is fascinating like solitaire or puzzle and gives an opportunity to have a great time, calm down and relax.
Sometimes it is called balls.
The purpose of the game is to arrange 4 balls of the same color in a line by clicking firstly on a ball and then on the square on which the ball should be moved
A ball moves from point to point only if the space isn’t blocked by other balls. In one move you can change the position of only one ball.
4 balls set in a line disappear. The game continues as long as available squares remain.
Features of the game:
• excellent chance to play and relax at the same time
• three levels of difficulty: for beginners, experts and masters
• The game improves logical thinking