String[] sample;
String alphabet = "abcdefghijklmnopqrstuvwxyz";

int[][] results = new int[676][3];

int occurrences = 0;

void setup(){
  //populate the letter pairs array
  for(int i=0;i<26;i++){
    for(int j=0;j<26;j++){
      results[i*26+j][0] = i;
      results[i*26+j][1] = j;
    }
  }
  //load sample text
  sample = loadStrings("bb.txt");
  //increment letter pairs array according to frequency in sample
  for(int i=0;i<sample.length;i++){
    sample[i] = sample[i].toLowerCase();
    for(int j=0;j<sample[i].length()-1;j++){
      char one = sample[i].charAt(j);
      char two = sample[i].charAt(j+1);
      if(alphabet.indexOf(one)!=-1&&alphabet.indexOf(two)!=-1){
        results[alphabet.indexOf(one)*26+alphabet.indexOf(two)][2]++;
        occurrences++;
      }
    }
  }
  //bubble sort the array
  for(int i=0;i<676;i++){
    for(int j=0;j<675-i;j++){
      if(results[j][2]<results[j+1][2]){
        int[] temp = results[j];
        results[j] = results[j+1];
        results[j+1] = temp;
      }
    }
  }
  //print the results as a text list
  /*
  for(int i=0;i<26;i++){
    for(int j=0;j<26;j++){
      println(str(alphabet.charAt(results[i*26+j][0]))+str(alphabet.charAt(results[i*26+j][1]))+" = "+results[i*26+j][2]);
    }
  }
  */
  //print the results as formatted html
  for(int i=0;i<26;i++){
    for(int j=0;j<26;j++){
      int r = round(max(min(255,results[i*26+j][2]*.18),0));
      int fs = round(max(min(96,results[i*26+j][2]*.06),10));
      if(results[i*26+j][2]>0){
        print("<span class='a' style='color:rgb("+r+",0,0);font-size:"+fs+"px;font-weight:bold;'>"+str(alphabet.charAt(results[i*26+j][0]))+str(alphabet.charAt(results[i*26+j][1]))+"</span> ");
      }else{
        print("<span class='a' style='font-size:"+fs+"px;'>"+str(alphabet.charAt(results[i*26+j][0]))+str(alphabet.charAt(results[i*26+j][1]))+"</span> ");
      }
    }
  }
}
void draw(){
  //nothing
}