發送短信 : Traffic light control for multi-junctions

 _____       ___     _    _      ___      ______  
|  __ \\    / _ \\  | |  | ||   / _ \\   /_____// 
| |  \ ||  | / \ || | |/\| ||  | / \ ||  `____ `  
| |__/ ||  | \_/ || |  /\  ||  | \_/ ||  /___//   
|_____//    \___//  |_// \_||   \___//   `__ `    
 -----`     `---`   `-`   `-`   `---`    /_//     
                                         `-`