diff --git a/D4han.ino b/D4han.ino
index 74f966a..615c8b8 100644
--- a/D4han.ino
+++ b/D4han.ino
@@ -1,6 +1,115 @@
+/*
+*******************************************************************************
+* Copyright (c) 2023 by M5Stack
+*                  Equipped with M5Core sample source code
+*                          配套  M5Core 示例源代码
+* Visit for more information: https://docs.m5stack.com/en/unit/tvoc
+* 获取更多资料请访问: https://docs.m5stack.com/zh_CN/unit/tvoc
+*
+* Describe: TVOC/eCO2.
+* Date: 2021/8/26
+*******************************************************************************
+Description: The screen will display TVOC and CO2.  屏幕将显示TVOC和CO2。
+Note: SGP30 needs 15 seconds to initialize calibration after power on.
+*/
+
+#include <M5StickCPlus.h>
+
+#include "Adafruit_SGP30.h"
+
+Adafruit_SGP30 sgp;
+TFT_eSprite spu = TFT_eSprite(&M5.Lcd); // Sprite object
+
+long last_millis = 0; // for 15sec wait timer
 
 void setup() {
+  M5.begin(115200);
+  M5.Lcd.setRotation(3);
+  
+  spu.setColorDepth(8);
+  spu.createSprite(240, 135);
+  
+  
+  M5.Lcd.setTextSize(2);
+  M5.Lcd.fillScreen(TFT_BLUE);
+  M5.Lcd.setTextSize(2);
+  M5.Lcd.setTextColor(TFT_BLACK);
+  M5.Lcd.setCursor(5, 5);
+  
+  while (!sgp.begin()) {  // Init the sensor.
+    M5.Lcd.println("Sensor not found");
+    delay(5000);
+  }
+  //  M5.Lcd.println("Initialization...");
+  
 }
 
 void loop() {
+  static int i = 4; //initializing
+  while (i > 0) {
+    if (millis() - last_millis > 1000) {
+      last_millis = millis();
+      i--;
+      spu.fillSprite(TFT_YELLOW);
+      spu.setTextColor( BLACK, YELLOW );
+      spu.setCursor(30, 4, 4);  spu.setTextSize(1);
+      spu.println("Initializing...");
+      
+      spu.setCursor(60, 34, 4);  spu.setTextSize(2);
+      spu.printf("  %d  ", i );
+      spu.pushSprite(0, 0);
+      delay(100);
+    }
+  }
+  
+  if (!sgp.IAQmeasure()) {  // Commands the sensor to take a single eCO2/VOC
+    // measurement.  命令传感器进行一次eCO2/VOC测量
+    Serial.println("Measurement failed");
+    return;
+  }
+  
+  spu.fillSprite(LIGHTGREY);
+  spu.setCursor(93, 5, 4);  spu.setTextSize(2);
+  spu.setTextColor( BLACK, LIGHTGREY);
+  spu.printf(" %d \n", sgp.TVOC);
+  
+  spu.setCursor(93, 65, 4);  spu.setTextSize(2);
+  spu.setTextColor( BLACK, LIGHTGREY);
+  spu.printf(" %d \n", sgp.eCO2);
+  
+  spu.setTextColor( BLUE, LIGHTGREY);
+  spu.setCursor(10, 20, 4);  spu.setTextSize(1);
+  spu.println("TVOC : ");
+  spu.setCursor(10, 80, 4);  spu.setTextSize(1);
+  spu.println("eCO2 : ");
+  
+  spu.pushSprite(0, 0); // 画面に反映させる
+  
+  Serial.printf("TVOC: %d eCO2: %d\n", sgp.TVOC, sgp.eCO2);
+
+  // eCO2が1000を超えたら音を鳴らす
+if (sgp.eCO2 > 1000) {
+   spu.setCursor(10, 120, 4);  spu.setTextSize(1);
+  spu.println("kankisite ");
+M5.Beep.setBeep(523, 500);  M5.Beep.beep();  
+}
+
+  M5.update();
+  if (M5.Axp.GetBtnPress() == 2) {
+    M5.Axp.Write1Byte(0x32, M5.Axp.Read8bit(0x32) | 0x80); // Power Off
+  }
+  delay(500);
+}
+
+
+
+
+
+
+
+
+
+
+
+void loop() {
 }