Revert "add red code in css"

This reverts commit a2c583d.

Author: Henry-Li-R

style.css

@@ -1,11 +1,8 @@
 .blue {
-    background-color:blue
+            background-color:blue
 }
 .circle{
-    border-radius:50%;
-    width:500px;
-    height:500px;
-}
-.red {
-    background-color:red
+            border-radius:50%;
+            width:500px;
+            height:500px;
 }