     }
 }
 
+/**
+ * Perform a quick stop
+ *
+ * Usage: "stop"
+ */
 void api_stop()
 {
     for (int i = 0; i < 4; i++)

    }
}

void api_v()
{
    int v[4] = {0, 0, 0, 0};

// ============================================================================
// custom functions:

/**
 * Start the engines
 *
 * Usage: "start"
 */
void api_start()
{
    for (int i = 0; i < 4; i++)
