add hw 12

src/s2-homeworks/hw12/HW12.module.css

@@ -0,0 +1,23 @@
+.dark {
+    background: dimgrey;
+}
+
+.dark-text {
+    color: aliceblue;
+}
+
+.red {
+    background: lightcoral;
+}
+
+.red-text {
+    color: aqua;
+}
+
+.some {
+    background: lightgreen;
+}
+
+.some-text {
+    color: darkslateblue;
+}