vec3 rgb(float r, float g, float b) {
	return vec3(r / 255.0, g / 255.0, b / 255.0);
}

float mysqrt(float f) {
	return sqrt(f);
}

float mydot(vec2 a) {
	return a.x*a.x + a.y*a.y;
}

void main() {
	vec2 center = u_resolution.xy * 0.5;
	float rad = 0.3 * u_resolution.y;
        vec3 blue = rgb(95.0, 60.0, 255.0);
	vec3 c = vec3(1.0,1.0,1.0);
	vec2 d = center-gl_FragCoord.xy;
	float dis = mysqrt(mydot(d)) - rad;
	if(dis < 1.0) {
		c = vec3(blue);
	}
	gl_FragColor = vec4(c,1.0);
}
//created by jarreed0 at shadergrounds.com