逐次実行 - てきとうメモ - cons @ wiki

Scheme

基本の構文とマクロ

(begin ...)
(begin0 ...)
(let (...) ...)
(let1 x value ...)
(when pred ...)

代入が続くときは

(let* (
 ...
 (data ...)
 (surf (cairo_create_image_surface_for_data ... data))
 (cr (cairo_create surf))
 (_ (cairo_rectangle cr ...))
 ...))