Merging codes with Arduino

The first code
#include <Adafruit_NeoPixel.h>
#ifdef AVR
#include <avr/power.h> // Required for 16 MHz Adafruit Trinket
#endif

// Digital IO pin connected to the button. This will be driven with a
// pull-up resistor so the switch pulls the pin to ground momentarily.
// On a high -> low transition the button press logic will execute.
int sensorPin=0;
boolean val =0;

#define PIXEL_PIN 9 // Digital IO pin connected to the NeoPixels.

#define PIXEL_COUNT 8 // Number of NeoPixels

// Declare our NeoPixel strip object:
Adafruit_NeoPixel strip(PIXEL_COUNT, PIXEL_PIN, NEO_GRB + NEO_KHZ800);

boolean oldState = HIGH;
int mode = 0; // Currently-active animation mode, 0-9

void setup() {

strip.begin(); // Initialize NeoPixel strip object (REQUIRED)
strip.show(); // Initialize all pixels to 'off'
pinMode(sensorPin, INPUT);
}

void loop() {
val =digitalRead(sensorPin);

if(val==HIGH) {

delay(20);

val = digitalRead(sensorPin);
if(val == LOW) {
if(++mode > 6) mode = 0;
switch(mode) {
case 0:
colorWipe(strip.Color( 0, 0, 0), 50);
break;
case 1:
colorWipe(strip.Color(255, 0, 0), 50);
break;
case 2:
colorWipe(strip.Color( 0, 255, 0), 50);
break;
case 3:
colorWipe(strip.Color( 0, 0, 255), 50);
break;
case 4:
theaterChase(strip.Color(127, 127, 127), 50);
break;
case 5:
theaterChase(strip.Color(127, 0, 0), 50);
break;
case 6:
theaterChase(strip.Color( 0, 0, 127), 50);
break;

 }

}
}
}

void colorWipe(uint32_t color, int wait) {
for(int i=0; i<strip.numPixels(); i++) {
strip.setPixelColor(i, color);
strip.show();
delay(wait);
}
}

void theaterChase(uint32_t color, int wait) {
for(int a=0; a<10; a++) {
for(int b=0; b<3; b++) {
strip.clear();

 for(int c=b; c<strip.numPixels(); c += 3) {
   strip.setPixelColor(c, color); 
 }
 strip.show(); 
 delay(wait); 

}
}
}

void rainbow(int wait) {

for(long firstPixelHue = 0; firstPixelHue < 3*65536; firstPixelHue += 256) {
for(int i=0; i<strip.numPixels(); i++) { // For each pixel in strip...

 int pixelHue = firstPixelHue + (i * 65536L / strip.numPixels());

 strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(pixelHue)));

}
strip.show();
delay(wait);
}
}

void theaterChaseRainbow(int wait) {
int firstPixelHue = 0;
for(int a=0; a<30; a++) {
for(int b=0; b<3; b++) {
strip.clear();

 for(int c=b; c<strip.numPixels(); c += 3) {
   
   int      hue   = firstPixelHue + c * 65536L / strip.numPixels();
   uint32_t color = strip.gamma32(strip.ColorHSV(hue)); // hue -> RGB
   strip.setPixelColor(c, color); 
 }
 strip.show();                
 delay(wait);                 
 firstPixelHue += 65536 / 90; 

}
}
}

The last one

#include <Adafruit_NeoPixel.h>
#ifdef AVR
#include <avr/power.h> // Required for 16 MHz Adafruit Trinket
#endif

#define PIXEL_PIN 9

#define PIXEL_COUNT 8

// Declare our NeoPixel strip object:
Adafruit_NeoPixel strip(PIXEL_COUNT, PIXEL_PIN, NEO_GRB + NEO_KHZ800);

boolean oldState = HIGH;
int mode = 0;

int Sensor = A0;

int clap = 0;
long detection_range_start = 0;
long detection_range = 0;
boolean status_lights = false;
void setup() {
pinMode(Sensor, INPUT);
pinMode(13,OUTPUT);

strip.begin();
strip.show();

}
void loop() {
int status_sensor = digitalRead(Sensor);
if (status_sensor == 0)
{
if (clap == 0)
{
detection_range_start = detection_range = millis();
clap++;
}
else if (clap > 0 && millis()-detection_range >= 50)
{
detection_range = millis();
clap++;
}
}
if (millis()-detection_range_start >= 400)
{
if (clap == 2)
{
if (!status_lights)
{
status_lights = true;
digitalWrite(13, HIGH);
}
else if (status_lights)
{
status_lights = false;
digitalWrite(13, LOW);
}
}
clap = 0;
}
}

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