analog sensor detection how to combine them

hi. im planning use water sensor in project. want 3 water sensors used. problem how other water sensor detect when first sensor detects input. disable 2 sensors. once removed, other sensor takes place first detects will. do?? pls.       

this codes 2 sensors.

const int wsensor1 = a0;
const int wsensor2 = a1;
const int wsensor3 = a2;

const int led1 = 2;
const int led2 = 3;
const int led3 = 4;

int wsensor1val = 0;
int wsensor2val = 0;
int wsensor3val = 0;

int thresh1 = 501;
int thresh2 = 502;
int thresh3 = 503;

void setup()
{
   serial.begin(9600);
   pinmode(led1, output);
   pinmode(led2, output);
   pinmode(led3, output);
}

void loop()
{
   wsensor1val = analogread(wsensor1);
   serial.print("wsensor1=");
   serial.println(wsensor1val);
   
   wsensor2val = analogread(wsensor2);
   serial.print("wsensor2=");
   serial.println(wsensor2val);
   
   wsensor3val = analogread(wsensor3);
   serial.print("wsensor3=");
   serial.println(wsensor3val);
   
   if(wsensor1val >= thresh1)
   {
      digitalwrite(led1, high);
      delay(1000);
      while(wsensor1val >= thresh1)
      {
         digitalwrite(led1, high);
         wsensor1val = analogread(wsensor1);
         delay(1500);
         if(wsensor1val < thresh1)
         {
            digitalwrite(led1, low);
            break;
         }
      }
   
   }
   
   if( wsensor2val >= thresh2)
   {
      digitalwrite(led2, high);
      digitalwrite(led1, high);
      delay(1000);
      while( wsensor2val >= thresh2)
      {
         digitalwrite(led2, high);
         digitalwrite(led1, high);
         wsensor2val = analogread(wsensor2);
         delay(1500);
         if( wsensor2val < thresh2)
         {
            digitalwrite(led2, low);
            break;
         }
      }
   }   
}

help pls!

why complexity while loops. couldn't this:

code: [select]


   if(wsensor1val >= thresh1)
   {
      digitalwrite(led1, high);
      delay(1000);
      while(wsensor1val >= thresh1)
      {
         digitalwrite(led1, high);
         wsensor1val = analogread(wsensor1);
         delay(1500);
         if(wsensor1val < thresh1)
         {
            digitalwrite(led1, low);
            break;
         }
      }
   
   }

just be:

code: [select]


 if(wsensor1val >= thresh1)
   {
      digitalwrite(led1, high);
   }
else
   {
      digitalwrite(led1, low);
   }


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