finished at the 8th card "high priestess" for today

learning/PixelSpirit/temperance.frag

@@ -0,0 +1,34 @@
+#ifdef GL_ES
+precision mediump float;
+#endif
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+uniform float u_time;
+
+#define PI 3.14159265359
+
+float squigly_line(in float midpoint, in float deviation, in vec2 st) {
+  return step(midpoint+(cos(st.y*PI)*deviation),st.x)-step(midpoint+deviation+(cos(st.y*PI)*deviation),st.x);
+}
+
+float stroke(in float x_coor, float s, float width){
+  float d = step(s,x_coor+width*.5)-step(s,x_coor-width*.5);
+  return clamp(d, 0.,1.);
+}
+
+void main() {
+  vec2 st = gl_FragCoord.xy/u_resolution;
+  vec3 color = vec3(0.0,0.0,0.0);
+  float alpha = 1.0;
+  float dev = .1;
+  // stagger for .3 .5 and .7, since we don't want any chance of deviation overlap
+  //color += squigly_line(.3, dev, st) + squigly_line(.5,dev,st)+squigly_line(.7,dev,st);
+
+  // after finishing the high priestess decided to come back to this one and try using the stroke function again.
+  float c = cos(st.y*PI)*dev;
+  color += stroke(st.x,.35+c,.1)+stroke(st.x,.5+c,.1)+stroke(st.x,.65+c,.1);;
+
+  
+
+  gl_FragColor = vec4(color, alpha);
+}