Im trying to calculate collision between the mouse and a group of points stored in an .txt file in this way:
0.0915193 1 2.49807 -1.2045 -3.12577;
0.183039 2 2.384 -2.06928 -3.37606; .....


The third value is the x and 4th is y. The code is not working as expected , its to suppose to change the color of the points i touch with the mouse, but other points change its color, do anybody have an idea of what am i doing wrong?

1. 
   agente[] bichos=new agente[344];
   String[]   sp;
   String[]   lines;
   
   void setup(){
     size(700,700);
     background(250,0,0);
     lines = loadStrings("primero.txt");
     float ii = 0; 
     for(int i = 0; i < lines.length ; i++){
        bichos[i]=new agente();
        sp = split(lines[i] , ' ' );
   
      }
    }
   
   
   void draw(){
   
   background(0,0,0);
   stroke(254, 0, 0);
   float ii = 0;
   float oo = 0;
     for(int i = 0; i < lines.length ; i++){
       sp = split(lines[i] , ' ' );
       ii =  145 +  float(sp[2]) *  21;
       oo =  145 +  float(sp[3]) *  21;
       
       bichos[i].move(ii, oo);
        
        
      if ( dist(  mouseX , mouseY, ii, oo) < 10){
         bichos[i].cambia();
         }
         else { bichos[i].nocambia();};
   
      }
    
   
   
   
    }
    
    
    
    class agente{
   
    
     int x;
     float rand_x = random(200);
     float rand_y = random(200);
     agente() {
     }
    
     void move(float ii , float oo) {
       x = x+ 1;
       ellipse(ii,  oo ,10,10);
     }
    
         void cambia() {
     fill(250,250,0) ;
    
     }
    
           void nocambia() {
     fill(250,0,0) ;
    
     }
   }