How to use accelerometer values to move a rectangle gradually without vibrations

Hi i wanna use ketai lib to pop out the values of accelX and use it move a rectangle box based on the TILT of the phone. I used the following code and tried to move the box, but it does not look stable because the value of accel keeps on changes even when i try to keep the phone stable.

import ketai.sensors.*;

KetaiSensor sensor; float accelerometerX, accelerometerY, accelerometerZ;

float val;

void settings() { fullScreen();

}

void setup() { sensor = new KetaiSensor(this); sensor.start(); // orientation(LANDSCAPE); textAlign(CENTER, CENTER); textSize(12); }

void draw() { background(0); text("Accelerometer: \n" + "x: " + nfp(accelerometerX, 1, 3) + "\n" + "y: " + nfp(accelerometerY, 1, 3) + "\n" + "z: " + nfp(accelerometerZ, 1, 3), 0, 0, width, height);

val = map (accelerometerX,-6,+6,0,width);
rect (val,height-50,100,10); frameRate(30);
}

void onAccelerometerEvent(float x, float y, float z) { accelerometerX = x;

accelerometerY = y; accelerometerZ = z; }

Pls help me!! Thanks!