Introduction - If you have any usage issues, please Google them yourself
Snake: 1. When the program starts, the snake began to crawl, when the downward direction of the default 2. When you press the up and down direction keys, Snake will be based on the keys pressed to change the current direction of travel 3. When When Snake crossed the border, or snakeheads met his snake, declared dead, regenerate 4. When a Snake Snake eats a food, it is automatically extended one node food: 1. When the program starts, the screen automatically generated within a food 2. When Snake death, regenerate a food 3. Generate the food can not coincide with the coordinates of the Snake