A dynamic language improves programmer productivity through flexible typing, a focus on high-level programming, and by streamlining the edit-compile-debug cycle. Live languages go beyond dynamic languages with more programmer-centric features. A live language supports live programming that provides programmers with responsive and continuous feedback about how their edits affect program execution. A live language is also based on declarative programming constructs such as rules or data-flow connections so that programmers can write less code. A live language should also provide programmers with responsive semantic feedback to enable time-saving services such as code completion. This paper describes the design a textual live language known as SuperGlue. SuperGlue is based on reactive values known as signals that are supported with declarative data-flow connections and dynamic inheritance. Through signals and dynamic inheritance, SuperGlue supports live programming, declarative progra...