void setSample(int sample) {
  if(setErease) {

    ereaseSample = sample;

  } else if(selectPattern) {

    loadPattern(sample);
    selectPattern = false;

  } else if(selectBank) {

    loadBank(sample);
    selectBank = false;

  } else {

    pattern[sample-1][step-1] = 1;
    for(int i=0; i<matrix[0]; i++) {
      for(int y=0; y<matrix[1]; y++) {
        printf("%d ", pattern[i][y]);
      }
      printf("\n");
    }
  }
}