# Function parameters causing unwanted animation
**URL:** https://discourse.processing.org/t/function-parameters-causing-unwanted-animation/29940
**Category:** Beginners
**Created:** [May 7, 2021, 2:10pm UTC](https://discourse.processing.org/t/function-parameters-causing-unwanted-animation/29940 "2021-05-07T14:10:55Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@theta](https://discourse.processing.org/u/theta)
#### Post date: [May 7, 2021, 2:10pm UTC](https://discourse.processing.org/t/function-parameters-causing-unwanted-animation/29940/1 "2021-05-07T14:10:55Z")
Hey everyone. I started exploring functions with parameters and can’t for the life of me figure out why the example below is animating.
```auto
Waves w1 = new Waves();
float amp = 100;
float phase = 1;
float freq = 100;
float offset = 0;
void setup() {
size(600, 600);
frameRate(60);
}
void draw() {
background(225, 255, 200);
if (mousePressed && (mouseButton == LEFT)) {
phase += 2;
} else if (mousePressed && (mouseButton == RIGHT)) {
phase -= 2;
}
if (keyPressed && (key == 'w')) {
amp += 2;
} else if (keyPressed && (key == 's')) {
amp -= 2;
}
if (keyPressed && (key == 'a')) {
freq += 2;
} else if (keyPressed && (key == 'd')) {
freq -= 2;
}
if (keyPressed && (key == 'q')) {
offset += 2;
} else if (keyPressed && (key == 'e')) {
offset -= 2;
}
w1.Wave1(amp, phase, freq, offset);
}
class Waves {
float theta = 0.1;
float thetaInc = TWO_PI/25;
void Wave1 (float a, float p, float f, float o) {
for (int i = 0; i < width; i+=1) {
strokeWeight(10);
stroke(0);
point(i, 250+o + ( a*sin(f/100*theta + p/100) ) );
theta += thetaInc;
}
}
}
```
What I want is for the wave to animate only when I press a key or mouse button as specified. But when I run it the “phase” aspect of the wave animates (first slow, then fast, then slow). Am I misunderstanding how parameters work? It works exactly the way I want when I draw the wave in directly in draw()
---
### Author:  [@Chrisir](https://discourse.processing.org/u/Chrisir)
#### Post date: [May 7, 2021, 2:38pm UTC](https://discourse.processing.org/t/function-parameters-causing-unwanted-animation/29940/2 "2021-05-07T14:38:48Z")
> [@theta](#):
>
> `theta = 0.1;`
Maybe you want to repeat this at the start of Wave1