class PiPoint{
 
  int offset;
  float x,y;
  float xunit=40;
  float yunit=1;
  float rad=3;
  
  
 PiPoint(int aoff){
   offset = aoff;
   x = xunit*offset;
   //ellipse(x,250,rad,rad);
 }
 
 void update(float acnt){
   calcnewpos(acnt);
   //ellipse(x,y,rad,rad);
 }
 
 void calcnewpos(float acount){
   int whatpi = offset + floor(acount);
   int nextpi = whatpi + 1;
   whatpi = getpi(whatpi);
   nextpi = getpi(nextpi);
   float ease = (offset + acount) - (offset + floor(acount));
   y = 0-yunit*whatpi - yunit*ease*(nextpi - whatpi);
 }
  
}