How can I specify this task in if ? is this even possible?

Other Hardware LEDs and Multiplexing
9 
int sensorPin = A0;
int newval = 0;

void setup() {
Serial.begin(9600);
pinMode(sensorPin, INPUT); }

void loop() {
int oldval = analogRead(A0);
oldval = map(oldval, 0, 1023, 0, 100);

if (newval > oldval) {
Serial.println("1"); }
if (newval < oldval) {
Serial.println("0"); }

newval = oldval;
delay(1000); }

I don't know who needs it, here is the code, not perfect but close to it, sorry for the flood)