Here's a Halloween themed light show decoration. It lights up while the skulls moves around.

Supplies

Here's the materials I used:

WS2812B
WIRES
2 PC SG90 servo
PCB
WEMOS
2 pc Skulls from Daiso
3D Printed parts

Tools used

3D Printer
Glue Gun
Mini Drill
Cable Tie
Micro USB Cable

Step 1: Make the 3D Printed Materials

Here are The Files For the 3d printed Materials. Made it using black, yellow, white and gray PLA filament.

The Files can be found at thingiverse. It can also be found here!

Step 2: Prepare the Lights

Cut 3 strips of WS2812B as shown.
Solder the wires on the WS2812B to be used later.
Mount the strips on the 3D printed parts by peeling the tape on the led strip's back.

Step 3: Prepare the Skulls

The skulls are from Daiso. Its made using soft plastic and it came on a pack of 4, so just in case you made a mistake, there would still be chances. ;)

How To Prepare

Make a hole on the back of the skulls for the servo horn, wires and for mounting it.
Secure the servos with 2 cable ties on each sides
Put the led strip holder on the back of the skull as show on the picture.

Step 4: Assemble It All

Use M2 and M3 Screws for assembling it as shown in the picture.

Assemble the coffin with 6 pieces M2 screws.
Place the Web inside.
Using a Mini Drill, Make a hole to assemble the moon, skulls and their respective wires.
Mount the moon and skulls using M3 screw.
Solder the electronics according to the circuit diagram.

Step 5: Upload the Code.

Here's the code I used with commented explanation. Copy this to your Arduino IDE, upload and let the spook-tacular Halloween begin! 👻

//initalize the following to control the WS2812B RGB Led strips
#include <FastLED.h>
#define NUM_LEDS 10
#define DATA_PIN 4
CRGB leds[15];


//Initialixe the follwing to control the Servos
#include <Servo.h>
Servo SERVO2;  
Servo SERVO1; 


int pos;


void setup() { 



 FastLED.addLeds<WS2812B, 4>(leds, 0, 3); //SERVO2_RGB is attached on pin 4 with 3 leds
  FastLED.addLeds<WS2812B, 13>(leds,3,3);//SERVO1_RGB is attached on pin 13 with 3 leds
  FastLED.addLeds<WS2812B, 12>(leds,6,9);//MOON is attached on pin 12 with 9 leds

 SERVO2.attach(5);//SERVO2  is attached on pin 14
 SERVO1.attach(14);//SERVO1 is attached on pin 14
}


//For Pretty transitioning of colors
void fadeall() { for(int i = 0; i < 15; i++) { leds[i].nscale8(250); } }


void loop() { 



	static uint8_t hue = 0; //initailize current color of strip

	// First slide the led in one direction
	for(int i = 0; i < 15; i++) {

    // Makes the moon's light brighter than the others by 50%
    if(i < 6){
   leds[i] = CHSV(hue++, 255, 128);  
    }else{
     uint8_t nexthue = hue+29;

    leds[i] = CHSV(nexthue, 255, 255);    // Set the i'th led to a different color. 
    }

		FastLED.show();  // Show the leds
		fadeall(); 

		delay(10);    // Wait a little bit before we loop around and do it again
	}


	// Now go in the other direction.  
	for(int i = (15)-1; i >= 0; i--) {


    if(i < 6){
   leds[i] = CHSV(hue++, 255, 128);  
    }else{
     uint8_t nexthue = hue+29;

    leds[i] = CHSV(nexthue, 255, 255);    // Set the i'th led to a different color. 
    }

		FastLED.show();// Show the leds
		fadeall();

		delay(10);// Wait a little bit before we loop around and do it again
	}


 //Moves the servo around
   for (pos = 15; pos <= 85; pos += 1) { // goes from 0 degrees to 85 degrees
     SERVO2.write(pos); // tell servo2 to go to position in variable 'pos'
     SERVO1.write(85-pos); // tell servo1 to move oppositely
    delay(15);  // waits 15ms for the servo to reach the position
  }
  delay(1000);
  for (pos = 85; pos >= 15; pos -= 1) { // goes from 180 degrees to 0 degrees
     SERVO2.write(pos); // tell servo2 to go to position in variable 'pos'
     SERVO1.write(85-pos);          // tell servo1 to move oppositely
    delay(15);                       // waits 15ms for the servo to reach the position
  }


}