Click word of numbers 1 to 10 in sequence. If you missed a number, then blink would stop responding. 
                
    
                
                
                    
                    |  |  | six | one |  | seven | 
|  |  |  | nine | two |  | 
|  |  |  |  | three |  | 
|  | ten |  | eigth |  | four | 
| five |  |  |  |  |  | 
|  |  |  |  |  |  | 
                
            
            
                
            Time = 0  sec.
               
            
            
            
            
            
                 
                (  
                     
 
                     
                     Tested on Windows 10. Should work on other platforms as well. 
                )
                     
                    Tested on Windows 10. Should work on other platforms as well. 
                )
            
        
        
        
            
    
    
      
        
        
            
            
                
            
            
            
                    Last modified at Feb 1. 2021