let a = ["a", "c", "c", "c", "a", "a", "a"];
let count = 0;

function rmDuplicate(rawData) {
  for (var i = 0; i <= a.length; i++) {
    for (var j = 0; j <= a.length; j++) {
      if (a[i] == a[j]) {
        count = count + 1;
      } else {
        count = 0;
      }
      if (count >= 3) {
        break;
      }
    }
    if (count >= 3) {
      // console.log('count = ' + count + 'because ' + a[i] + 'at position' + i + ' to next 3');
      console.log("count " + count + ", Now removing...");

      for (var k = 0; k <= count; k++) {
        console.log(`Before : ${a}`)
        a.splice(i, 1);
        console.log(`After : ${a}`)
      }

      count = 0;
      i = 0;
    }
    console.log(` Now array: ${a}`);
  }
}
rmDuplicate(a);