#include <TM1637Display.h>

#define clk 9
#define dio 10

TM1637Display disp =TM1637Display(clk,dio);

void setup() {
  // put your setup code here, to run once:
disp.clear();
disp.setBrightness(7);

}

void loop() {
 int a;
for(a=0;a<1000;a++)

{
disp.showNumberDec(a);
delay(100);
disp.clear();
}

}