eraseLines function
Implementation
String eraseLines(int count) {
final erase = StringBuffer(), end = count - 1;
for (int i = 0; i < count; i++) {
erase.write(eraseLine);
if (i < end) erase.write(cursorUp());
}
if (count != 0) erase.write(cursorLeft);
return erase.toString();
}