How to make a "visual voltmeter" using and LED strip

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Hi,
I am just getting back to this project. Thank you for your reply. I am actually using a neopixel programmable led strip but I am still a little fuzzy on how to make it work. I am using a simple voltage divider to measure the voltage from my two sources. See the code below.

/*********************************************
*

  • Arduino DC Voltmeter

*********************************************/

float vPow = 4.7;
float r1 = 100000;
float r2 = 10000;

void setup() {

Serial.begin(9600);

}

void loop() {
float v = (analogRead(0) * vPow) / 1024.0;
float v2 = v / (r2 / (r1 + r2));
float v3 = (analogRead(1) * vPow) / 1024.0;
float v4 = v3 / (r2 / (r1 + r2));

Serial.print(v2);
Serial.print(",");
Serial.println(v4);

delay(1000);
}

I am looking to incorporate the LED strip to show the difference in voltage between the two sources.

Thanks