tile shader code

shader_type canvas_item;

uniform sampler2D anim_texture;
uniform float bpm = 95.0;
uniform vec4 component_multiply : hint_color;
uniform float b_mult = 0.5;

uniform vec4 color_r : hint_color;
uniform vec4 color_g : hint_color;
uniform vec4 color_b : hint_color;

void fragment(){
    float a = texture(TEXTURE, UV).a;
    float r = texture(TEXTURE, UV).r;
    float g = texture(TEXTURE, UV).g;
    float b = texture(TEXTURE, UV).b;
    b *= b_mult;
    float time_phase = mod(TIME * bpm / 60.0, 1.0);
    float r_value = texture(anim_texture, vec2(time_phase, r)).r;
    float g_value = texture(anim_texture, vec2(time_phase, g)).g;
    float b_value = texture(anim_texture, vec2(time_phase, b)).b;

    r_value *= component_multiply.r;
    g_value *= component_multiply.g;
    b_value *= component_multiply.b;
//  COLOR.rgb = max(g_value, max(r_value, b_value)) * vec3(1.0);
    vec4 color = vec4(0.0);
    color = mix(color, color_b, b_value);
    color = mix(color, color_r, r_value);
    color = mix(color, color_g, g_value);
    COLOR.rgb = color.rgb;
    COLOR.a = min(max(max(r_value, b_value), g_value), a);

}