發送短信 : Why do we choose the color red for danger?

  ______    _____    _    _      ___      _  __  
 /_   _//  |  ___|| | \  / ||   / _ \\   | |/ // 
 `-| |,-   | ||__   |  \/  ||  | / \ ||  | ' //  
   | ||    | ||__   | .  . ||  | \_/ ||  | . \\  
   |_||    |_____|| |_|\/|_||   \___//   |_|\_\\ 
   `-`'    `-----`  `-`  `-`    `---`    `-` --`