var x_coord = 0;
var current_y = 0;
var initial_price = 0;
var count = 0;
var bought = 0;
var trade_profit = current_y - initial_price;

function draw() {
    x_coord = x_coord + 25;
  var canvas = document.getElementById('canvas');
  if (canvas.getContext) {
    var ctx = canvas.getContext('2d');
    var rand_y = Math.floor(Math.random() * 100);
    current_y = rand_y;
    ctx.strokeRect(x_coord, rand_y, 20, 50);
  }
  if((bought == 1) && (count < 1)){
    count++;
    const temp_val = rand_y;
    initial_price = temp_val;
    document.getElementById("profits").innerHTML = temp_val - current_y;
  }
  if((bought == 1) && (count >= 1)){
    document.getElementById("profits").innerHTML = temp_val - current_y;
  }
}
function Buy(){
    bought = 1;
}