PNG images transparency

[bbjodel]

Hi,
I would like to put three PNG images flashing with transparency to report an error, I am a novice in coding, can you help me?

I cannot have the transparency of the PNG images or the flashing of these three images.

Best regards
Alfred

Here is my code:

`/* 08 mai 2023 - ESP32 JAUGES CAN BUS */

#include <M5Stack.h>
#include <Free_Fonts.h>
#include "BatteriePleine.h"
#include "Warning.h"
#include "Essai.h"
#include "Image.h"

#define SCREEN_Y 240 // Screen sizes are set here.
#define SCREEN_X 320

TFT_eSPI tft = TFT_eSPI();
TFT_eSprite gdraw = TFT_eSprite(&M5.Lcd);

uint8_t displayMode;
uint16_t displayBrightness = 100;

void setup() {

Serial.begin(115200);

M5.begin();
M5.Lcd.fillScreen(TFT_WHITE);
delay (100);

gdraw.setColorDepth(8);
gdraw.createSprite(SCREEN_X, SCREEN_Y);
gdraw.setFreeFont(FSSB9); // HA
gdraw.setTextWrap(false); // Very important for scaling

displayMode = 1; // Demarre en Ecran sur page x

} // Fin setup()

void loop() {

if (displayMode == 1) {
gdraw.fillSprite (TFT_BLACK);
M5.update();
}

if (M5.BtnC.wasPressed() && !M5.BtnA.wasPressed() && (displayBrightness > 0)) {
displayBrightness *= 2; // brightness up
}

if (M5.BtnA.wasPressed() && !M5.BtnC.wasPressed() && (displayBrightness <= 255)) {
displayBrightness /= 2; // brightness down
}

if (displayBrightness < 1) displayBrightness = 1;
if (displayBrightness > 255) displayBrightness = 255;
M5.Lcd.setBrightness (displayBrightness);

if (M5.BtnB.wasPressed()) displayMode++;
if (displayMode > 1) displayMode = 1;

gdraw.setTextColor (TFT_CYAN);
gdraw.setFreeFont(FSSB18);
gdraw.setCursor(20, 120);
gdraw.print("ALFRED 1962");
gdraw.pushImage(3, 3, BatteriePleineWidth, BatteriePleineHeight, BatteriePleine);

int a = 1;

if(a == 1) {
M5.update();
gdraw.pushImage(85, 35, ImageWidth, ImageHeight, Image);
delay(1000);
}
gdraw.pushSprite (0, 0);

} // Fin loop()`