ESPectro32_Adafruit_IS31FL3731

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_IS31FL3731.h>

Adafruit_IS31FL3731 matrix = Adafruit_IS31FL3731();

static const uint8_t PROGMEM
triangle[] =
{ B00000000,
  B00010000,
  B00101000,
  B01000100,
  B11111110,
  B00000000,
  B00000000,
  B00000000
},
square[]  =
{ B00000000,
  B00000000,
  B01111110,
  B01000010,
  B01000010,
  B01111110,
  B00000000,
  B00000000
};
void setup() {

  Serial.begin(9600);
  if (! matrix.begin()) {
    Serial.println("IS31 not found");
    while (1);
  }
  Serial.println("IS31 Found!");
}
void loop() {
  matrix.setRotation(0);

  matrix.clear();
  matrix.drawBitmap(0, 0, triangle, 7, 7, 255);
  delay(500);

  matrix.clear();
  matrix.drawBitmap(0, 0, square, 7, 7, 255);
  delay(500);

  matrix.clear();
  matrix.drawCircle(3, 3, 3, 255);
  matrix.drawCircle(3, 3, 3, 255);
  delay(500);
}