请在这里粘贴代码
```while(True):
    img = sensor.snapshot()
    left_roi = [80,40,140,140]
    blobs1 = img.find_blobs([red_thresholds],roi=left_roi)#让红色色块为blob1
    blobs2 = img.find_blobs([green_thresholds],roi=left_roi)#让绿色色块为blob2
    blobs3 = img.find_blobs([blue_thresholds],roi=left_roi)#让蓝色色块为blob3

    light = Timer(2, freq=50000).channel(1, Timer.PWM, pin=Pin("P6"))
    light.pulse_width_percent(10) # 控制亮度 0~100
    i2c = I2C(2)
    distance = VL53L1X(i2c)

    if blobs1:#红色

       max_blob=find_max(blobs1)
       img.draw_rectangle(max_blob.rect())#框选最大色块
       img.draw_cross(max_blob.cx(), max_blob.cy())#在最大色块中心画十字
       data="1"
       data_out = json.dumps(set(data))#将data转化为json
       uart.write(data_out +'\n')#写到缓冲区，由arduino进行读取
       print('you send:  range: mm',data_out,distance.read())#写到串口监视端，让你能够看到数据