connectFourBot.js

process.stdin.setEncoding("UTF-8");

process.stdin.on("data", function(data) {
  var gameState = JSON.parse(data);
  if (gameState["winner"]) return;
  
  var rowCount = gameState['board'].length;
  var columnCount = gameState['board'][0].length;
  
  process.stdout.write(Math.floor(Math.random() * columnCount).toString() + "\n");
  process.stdin.resume();
});

process.stdin.resume();