Проблема с циклами и клеточным игровым полем

var grid_tmp_pos = 0; 
var grid_config = { 
  g_width: 50, 
  g_height: 50 
}; 
var grid_state = ''; 
for (i = 1; i <= grid_config.g_height; i++) { 
  for (o = 1; o <= grid_config.g_width + 1; o++) { 
    if (o > grid_config.g_width) { 
      document.getElementById("gamefield").innerHTML = grid_state + '<br>'; 
      grid_state = document.getElementById("gamefield").innerHTML; 
      grid_tmp_pos += (o - 1); 
    } else { 
      /*Настройки клетки*/ 
    } 
  } 
}

<div id="gamefield"></div>