Add tasks for all the new languages

Task/Draw-a-clock/Sidef/draw-a-clock.sidef

@@ -0,0 +1,31 @@
+STDOUT.autoflush(1)
+
+var (rows, cols) = `stty size`.words.map{.to_i}...
+
+var x = (rows/2 - 1  -> int)
+var y = (cols/2 - 16 -> int)
+
+var chars = [
+                 "┌─┐  ╷╶─┐╶─┐╷ ╷┌─╴┌─╴╶─┐┌─┐┌─┐   ",
+                 "│ │  │┌─┘╶─┤└─┤└─┐├─┐  │├─┤└─┤ : ",
+                 "└─┘  ╵└─╴╶─┘  ╵╶─┘└─┘  ╵└─┘╶─┘   "
+             ].map {|s| s.split(3) }
+
+func position(i,j) {
+    "\e[%d;%dH"%(i, j)
+}
+
+func indices {
+    var t = Time.local;
+    "%02d:%02d:%02d"%(t.hour, t.min, t.sec).split(1).map{|c| c.ord - '0'.ord}...
+}
+
+loop {
+    print "\e[H\e[J";
+    chars.range.each { |i|
+      print position(x + i, y);
+      print [chars[i][indices()]].join(' ');
+    }
+    print position(1, 1);
+    Sys.sleep(1);
+}