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Before going further we must know what vale will sensor gives when different colors are take in fornt of the sensor

So first wire the sensor and arduino as shown in picture you may skip to attache those servo at this point of time.

Load the code attached here to your arduino board

open the serial monitor

You are getting some value like

R= ** G= ** B= **

** are any numbers

now bring color sheet in front of the sensor you will see the RGB numbers are change and keeps repeating as soon as you keep that color sheet in front of that sensor.

you will get different set of RGB numbers for different,

so it is clear that sensor detect different colors and gives different value.

now we have to write down the RGB value for the color which are going to use in project

for example when i bring YELLOW color in front of sensor i get

R=22 G=29 B=32

so i can say that

if (R>17 & R<27 & G>25 & G<34)

COLOR=YELLOW;

here i kept margin of +-5 for RGB values to compensate the fluctuate sensor values.

in this way take the readings of different colors which you need to use and add those values in code at this place

if(R<25 & R>15 & G<33 & G>23) {color = 1; // YELLOW }

if(R<55 & R>45 & G<49 & G>39) {color = 2; // GREEN }

if(R<70 & R>60 & G<10 & G>20){color = 3; // PINK }

if(R<7 & R>11 & G<21 & G>35){color = 4; // Red

and upload the code connect the both servos fix all the required components load the color candy in tube and your machine is ready to short the candy of different colors.