doc/tutorial/basics: add basics tutorial
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+[TOC](Readme.md) [Prev](stringlit.md) [Next](scopes.md)
+
+# Bytes
+
+CUE distinguishes between a `string` and a `bytes` type.
+Bytes are converted to base64 when emitting JSON.
+Byte literals are defined with single quotes.
+The following additional escape sequences are allowed in byte literals:
+
+ \xnn // arbitrary byte value defined as a 2-digit hexadecimal number
+ \0nnn // arbitrary byte value defined as a 3-digit octal number
+
+
+<!-- CUE editor -->
+```
+a: '\x03abc'
+```
+
+<!-- JSON result -->
+```json
+{
+ a: "A2FiYw=="
+}
+```
