#include <TM1637Display.h> 
 
const int CLK = 8; //Set the CLK pin connection to the display 
const int DIO = 9; //Set the DIO pin connection to the display 
 
uint8_t blank[] = {0x00, 0x00, 0x00,0x00}; // store the initial input 
uint8_t ring[] = {0x06, 0x3f, 0x3f,0x3f}; // the numbers represents the values 1, 0, 0, 0 
uint8_t dumy[] = {0x3f, 0x3f, 0x3f, 0x3f}; 
TM1637Display display(CLK, DIO); //set up the 4-Digit Display. 
int i = 0; 
void setup(){ 
display.setBrightness(7); //set the diplay to maximum brightness 
display.setSegments(blank);//display the initial value
} 
 
void loop(){ 
display.setSegments(ring); 
delay(1000); 
for(i=0;i<3;i++){ 
ring_counter(); 
} 
} 
 
void ring_counter(){ 
for (i=0;i<4;i++){ 
dumy[i]=ring[(i+3)%4]; 
} 
display.setSegments(dumy); 
delay(1000); 
for(i=0;i<4;i++){ 
ring[i]=dumy[i]; 
}
}