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

learning/PixelSpirit/branch.frag

@@ -0,0 +1,23 @@
+#ifdef GL_ES
+precision mediump float;
+#endif
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+uniform float u_time;
+
+#define PI 3.14159265359
+
+void main() {
+  vec2 st = gl_FragCoord.xy/u_resolution;
+  vec3 color = vec3(0.0,0.0,0.0);
+  float alpha = 1.0;
+  float dev = .25;
+  // the card itself has another way to do this, instead of 1.0-st.x+st.y it uses .5+(st.x-st.y)*.5
+  // which i like more
+  color += step(.45, (1.0-st.x+st.y)*.5)-step(.55, (1.0-st.x+st.y)*.5);
+  
+
+
+
+  gl_FragColor = vec4(color, alpha);
+}