Set up the vertical grid and choose two players
Decide who goes first
On your turn, drop one of your colored discs into any open column
The disc falls to the lowest available space in that column
Take turns placing one disc at a time
Try to connect four of your discs in a row
Make a row horizontally, vertically, or diagonally
Block your opponent when they are close to connecting four
The game ends when a player connects four discs
The game is a draw if the board fills up with no winner