Target Four 1.5

The aim of the game is to create four equal token, top/down, side by side or diagonally. Your color is green, the color of the computer is red. The token are on the lower edge of the board. There is a total of 21 tokens available.
You start every new game. The first token is to be installed in the bottom row. All other tokens must be processed on top of another token.
Whoever achieves four equal token at first has won.