ah crap! sorry, i want..well, i think the best way would be to use some other language as an example I want something like Zig, or C or any other low level pro

ah crap! sorry, i want..well, i think the best way would be to use some other language as an example I want something like Zig, or C or any other low level programming language but i want it to be extensible and interactive, so that i can interactively explore the system, add constructs that i want to, etc. Macro/HL assemblers sound good but they are missing the interactivity