1 files changed, 21 insertions, 0 deletions
diff --git a/examples/script/context2d/scripts/alpha.js b/examples/script/context2d/scripts/alpha.js
new file mode 100644
index 0000000..23fa5d4
--- /dev/null
+++ b/examples/script/context2d/scripts/alpha.js
@@ -0,0 +1,21 @@
+var ctx = document.getElementById('tutorial').getContext('2d');
+  // draw background
+  ctx.fillStyle = '#FD0';
+  ctx.fillRect(0,0,75,75);
+  ctx.fillStyle = '#6C0';
+  ctx.fillRect(75,0,75,75);
+  ctx.fillStyle = '#09F';
+  ctx.fillRect(0,75,75,75);
+  ctx.fillStyle = '#F30';
+  ctx.fillRect(75,75,75,75);
+  ctx.fillStyle = '#FFF';
+
+  // set transparency value
+  ctx.globalAlpha = 0.2;
+
+  // Draw semi transparent circles
+  for (i=0;i<7;i++){
+      ctx.beginPath();
+      ctx.arc(75,75,10+10*i,0,Math.PI*2,true);
+      ctx.fill();
+  }