master vu meter

[yall]

hello, I am looking for a way to make a saw meter of the master with 2 buttons, right and left. there is a version on the forum but I can't modify it as I want.
this one>

/** Creates a VU-Meter from a filmstrip for the master volume. */
inline function createFilmStripVuMeter(name, x, y, isLeft)
{
local widget = Content.addPanel(name, x, y);

Content.setPropertiesFromJSON(name, {
  "width": 50, // this uses the exact dimensions of one filmstrip
  "height": 60,
  "opaque": false // opaque is important in order to increase the drawing performance
});

// Put the image in your image folder
widget.loadImage("{PROJECT_FOLDER}LED_Output_Meter_V1_128_Frames_127_x_167_pixels.png", "filmstrip");

widget.data.value = 0.0;
widget.data.isLeft = isLeft;

// Set the initial image 
widget.setImage("filmstrip", 0, 0);

widget.setTimerCallback(function()
{
	// Get the peak value from the master output
	var newValue = Engine.getMasterPeakLevel(this.data.isLeft ? 0 : 1);
	
	if(newValue > this.data.value)
		this.data.value = newValue;
	else
		// Just decay the current value (0.99 controls the decay time)
		this.data.value = this.data.value * 0.96;
	
	// Calculate the filmstrip index
	// this must be an integer value
	// 84 is used instead of 128 because 84 is ~0dB which is
	// more accurate for this example filmstrip
	var index = parseInt(this.data.value * 150.0);
	
	// If you just want to paint one image, 
	// you don't need the paint routine, but
	// just use this method
	// the yOffset is index * heightOfFilmstrip
	this.setImage("filmstrip", 0, index * 167);	
});

widget.startTimer(30);
return widget;

};

const var VuMeterLeft = createFilmStripVuMeter("VuMeterLeft", 60, 150, false);
const var VuMeterRight = createFilmStripVuMeter("VuMeterRight", 60, 110, true);

this one is complicated to move, to modify

thank u ;)