Simple 2d Water

Very simple 2d water for cartoon game graphics

Shader code

shader_type canvas_item;


uniform sampler2D bg : hint_albedo;
uniform sampler2D wave1 : hint_albedo;
uniform sampler2D wave2 : hint_albedo;
uniform sampler2D noise : hint_black_albedo;

vec2 tile(vec2 _st, float _zoom){
    _st *= _zoom;
    return fract(_st);
}

float box(vec2 _st, vec2 _size){
    _size = vec2(0.5)-_size*0.5;
    vec2 uv = smoothstep(_size,_size+vec2(1e-4),_st);
    uv *= smoothstep(_size,_size+vec2(1e-4),vec2(1.0)-_st);
    return uv.x*uv.y;
}

void fragment(){
	vec2 st = vec2(UV.x/(SCREEN_PIXEL_SIZE.y/SCREEN_PIXEL_SIZE.x),UV.y);
    vec3 color = vec3(0.0);
   st = tile(st,8.0);
	color += texture(bg,st).rgb;
	color += 0.5* texture(wave1,vec2(st.x + TIME * 0.02,st.y +0.2  + sin(TIME*1.5) * 0.06)).rgb / 0.5 * texture(noise,vec2(st.x + cos(TIME * 0.5),st.y)).rgb;
	color += 0.5* texture(wave2,vec2(st.x - TIME * 0.08,st.y)).rgb / 0.5 * texture(noise,vec2(st.x ,st.y - sin(TIME * 0.5))).rgb;
	COLOR = vec4(color,1.0);
}