add 78 sinewave in ruby

78 Sine Wave/ruby/sinewave.rb

@@ -0,0 +1,15 @@
+def intro
+  puts "                              SINE WAVE
+               CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY\n\n\n\n\n\n"
+end
+
+def main
+  intro
+  (0..40).step(0.25).each do |t|
+    a = (26 + 25 * Math.sin(t)).to_i
+    text = (t % 0.5) == 0 ? "CREATIVE" : "COMPUTING"
+    puts " " * a + text
+  end
+end
+
+main