Requirements

The Snake Pit:

• The snake pit is the area where the snake can move.
• The snake pit must utilize all available space of the current terminal window.
• There must be a visible border delineating the snake pit.

The Snake:

• The initial length of the snake is three characters.
• Initial direction of the snake's movement is chosen randomly.
• The user can press one of the four arrow keys to change the direction of the snake's movement.
• The snake's speed is proportional to its length.

The Trophies:

• Trophies are represented by a digit randomly chosen from 1 to 9.
• There's always exactly one trophy in the snake pit at any given moment.
• When the snake eats the trophy, its length is increased by the corresponding number of characters.
• A trophy expires after a random interval from 1 to 9 seconds.
• A new trophy is shown at a random location on the screen after the previous one has either expired or is eaten by the snake.
• A new trophy is shown at a random location on the screen after the previous one has either expired,
• or is eaten by the snake.
• Trophies should not spawn at the same coordinates of a snake segment

Gameplay:

The snake dies and the game ends if:

• It runs into the border; or
• It runs into itself; or
• The user attempts to reverse the snake's direction.

The user wins if:

• The snake's length grows to the length equal to half the perimeter of the border.