Example uses Render struct.

door/line.go

@@ -31,9 +31,12 @@ func (l *Line) Output() string {
 	}
 }
 
+//
+// The old example of a render function (before Render struct)
+//
 // Sample RenderF function
 // Upcase is BOLD Blue, everything else is Yellow
-func RenderBlueYellow(text string) string {
+func Render_BlueYellow(text string) string {
 	var output string
 	var lastColor string
 
@@ -73,3 +76,21 @@ func (r *Render) Append(color string, len int) {
 	r.Result += r.Line[r.Pos : r.Pos+len]
 	r.Pos += len
 }
+
+// Sample RenderF function
+// Upcase is BOLD Blue, everything else is Yellow
+func RenderBlueYellow(text string) string {
+	var r Render = Render{Line: text}
+
+	blue := ColorText("BOLD BLUE")
+	yellow := ColorText("BOLD YELLOW")
+
+	for _, letter := range text {
+		if unicode.IsUpper(letter) {
+			r.Append(blue, 1)
+		} else {
+			r.Append(yellow, 1)
+		}
+	}
+	return r.Result
+}