hello there is an issue with my processing code. mly can not be resolved as a variable it says. Here is the code.

import processing.sound.$*$;

ArrayList mountain$1=$ new ArrayList$()$;

ArrayList mountain$2=$ new ArrayList$()$;

ArrayList mountain$3=$ new ArrayList$()$;

PImage$[]$ runFrames $=$ new PImage$[8]$;

int framelndex $=0$;

int frameDelay $=8$;

int frameCounter $=0$;

SoundFile runningSound;

float jumpForce $=-10$;

float gravity $=0\mathrm{.}6$;

float yVelocity $=0$;

float characterY;

boolean isJumping $=$ false;

PImage squirrelImg;

ArrayList squirrels $=$ new ArrayList$()$;

class Squirrel $\{$

float x$,$ y;

int size;

Squirrel$($float x$,$ float y$,$ int size$)\{$

this.x $=$ x;

this.y $=$ y;

this.size $=$ size;

$\}$

void display$()\{$

image$($squirrelImg$,$ x$,$ y$,$ size, size$)$;

$\}$

$\}$

void setup$()\{$

size$(1080,720)$;

characterY $=$ height $/2$;

m$1$y $=$ height$/2$;

m$2$y $=$ height$/4$;

m$3$y $=$ height$/6$;

generate$($mountain$1,$ m$1$y$,$ m$1$s$)$;

generate$($mountain$2,$ m$2$y$,$ m$2$s$)$;

generate$($mountain$3,$ m$3$y$,$ m$3$s$)$;

noStroke$()$;

for $($int i $=0$; i $<$ runFrames.length; i$++)\{$

runFrames$[$i$]=$ loadImage$("$run$-"+($i$+1)+".$png$")$;

$\}$

runningSound $=$ new SoundFile$($this$,$ "running$3.$mp$3")$;

squirrelImg $=$ loadImage$("$squirrel$.$png$")$;

$\}$

void draw$()\{$

background$(100,200,255)$;

move$($mountain$1,4,$ m$1$y$,$ m$1$s$)$;

move$($mountain$2,2,$ m$2$y$,$ m$2$s$)$;

move$($mountain$3,1,$ m$3$y$,$ m$3$s$)$;

fill$(169,36,178)$;

show$($mountain$3)$;

fill$(174,89,180)$;

show$($mountain$2)$;

fill$(255,200,200)$;

show$($mountain$1)$;

if $($frameCounter$++\%$ frameDelay $==0)\{$

framelndex $=($framelndex $+1)\%$ runFrames.length;

$\}$

image$($runFrames$[$framelndex$],$ width$/2-$ runFrames$[$framelndex$].$width$/2,$ characterY $-$ runFrames$[$framelndex$].$height$/2)$;

if $($random$(1)<0\mathrm{.}01)\{//$ Adjust the probability of squirrel spawning

spawnSquirrel$()$;

$\}$

for $($int i $=$ squirrels.size$()-1$; i $>=0$; i$--)\{$

Squirrel squirrel $=$ squirrels.get$($i$)$;

squirrel.display$()$;

$//$ Check for collision with sprite

if $($dist$($width$/2,$ characterY, squirrel.x $+$ squirrel.size$/2,$ squirrel.y $+$ squirrel.size$/2)<50)\{$

$//$ Do something if there's a collision

$\}$

$\}$

if $($isJumping$)\{$

yVelocity $+=$ gravity;

characterY $+=$ yVelocity;

if $($characterY $>=$ height $/2)\{$

characterY $=$ height $/2$;

yVelocity $=0$;

isJumping $=$ false;

$\}$

$\}$

$\}$

void move$($ArrayList mountain, float speed, float y$,$ float size$)\{$

for $($int i $=0$; i $<$ mountain.size$()$; i$++)\{$

mountain.get$($i$).$x $-=$ speed;

$\}$

if $($mountain$.$get$(0).$x $<0)\{$

mountain.remove$(0)$;

$\}$

while $($mountain$.$get$($mountain$.$size$()-1).$x $<$ width $+2*$ size$)\{$

mountain.add$($new PVector$($mountain$.$get$($mountain$.$size$()-1).$x $+$ size $+$ random$(-$size$/2,$ size$/2),$ y $+$ random$(-$size, size$)))$;

$\}$

$\}$

void generate$($ArrayList mountain, float y$,$ float size$)\{$

mountain.add$($new PVector$(0,$ y $+$ random$(-$size, size$)))$;

while $($mountain$.$get$($mountain$.$size$()-1).$x $<$ width$)\{$

mountain.add$($new PVector$($mountain$.$get$($mountain$.$size$()-1).$x $+$ size $+$ random$(-$size$/2,$ size$/2),$ y $+$ random$(-$size, size$)))$;

$\}$

$\}$

void show$($ArrayList mountain$)\{$

beginShape$()$;

vertex$($width$,$ height$)$;

vertex$(0,$ height$)$;

for $($int i $=0$; i $<$ mountain.size$()$; i$++)\{$

vertex$($mountain$.$get$($i$).$x$,$ mountain.get$($i$).$y$)$;

$\}$

endShape$($CLOSE$)$;

$\}$

void spawnSquirrel$()\{$

float x $=$ random$($width$)$;

float y $=$ random$($height$/2)$;

int size $=50$; $//$ Adjust squirrel size as needed

Squirrel squirrel $=$ new Squirrel$($x$,$ y$,$ size$)$;

squirrels.add$($squirrel$)$;

$\}$

void keyPressed$()\{$

if $($key $==\text{'}\text{'}$ && $!$isJumping$)\{$

yVelocity $=$ jumpForce;

isJumping $=$ true;

runningSound.play$()$;

$\}$

$\}$