Still working on double dice

[thecarpenteir]

Why is this working WITHOUT the "while" statement? If I touch ANY pin to ground , the dice (display) roll and stop and remain when pin not connected? The button does not even need to be given a pin number and while statement not needed. Trying to get 2 dice to roll on my nano with a TM1637, 4 segment display with a photocell for a button.
No other wiring than four TM1637 pins and ground any other pin on nano.

#include <TM1637.h>
//using nano with button between 8 and ground
//declare pins
int CLK = 2;
int DIO = 3;
int button = A2;

TM1637 tm(CLK, DIO);

void setup() {

  pinMode(button, INPUT);

  //initialize TM1637 seven segment display;set brightness; 0-7
  tm.set(2);
  tm.init();
}

void loop() {

  // while   (    digitalRead(button));
  tm.display(0, random(1, 7));

  delay(50);

  //while (    digitalRead(button));
  tm.display(3, random(1, 7));
}
```Thanks again for any help
Greg

[gilshultz]

Interesting description but you are describing a hardware problem without an annotated schematic this is difficult to solve. Links to the hardware items will help us help you, be sure they have technical information.

[gcjr]

@thecarpenteir

pinMode(button, INPUT);

after you sort out your mystery, you'll probably want to configure the input as INPUT_PULLUP to enable the internal pull-up resistor.

[build_1971]

Please add a photo of your setup as well.
Your problem may also be that your schematic is different from your real setup...