 int e_color_g = 0;
 int e_color_b = 255;
 
-float brightness_min = 0.5; // 平常時のBrightness
-float brightness = 1;
+float instrument_brightness_min = 0.5; // default brightness
+float instrument_brightness = 1;
+float effect_brightness = 0;
 
 int divide = 2; // LEDパターンの分割数
 float slit_position = 0.5; // 0~1 分割された区分の中のどこまでがinstrumentにするか。0だと全部effect color。1だと全部instrument color。

    }
  }
  else {
    if(brightness_min+0.01 <= brightness) {
      brightness -= 0.01;
      updateLED();
    }
  }

    // sound trigger
    // "s:;"
    else if(command=="s") {
      instrument_brightness = 1.0;
      instrument_flag = !instrument_flag;
    }
    // set divide number
