runnable fragment
code snippet
uniform float level;
uniform float radius;
uniform vec2 center;
uniform vec4 bgColor;
uniform vec4 lineColor;
uniform int majorDivisions;
uniform int minorHDivisions;
uniform int minorVDivisions;
uniform float majorDivisionLineWidth;
uniform int square;
precision mediump float;
/*{
"CATEGORIES": [
"Geometry"