diff --git a/CMakeLists.txt b/CMakeLists.txt
index 887bb43..5457bdb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,3 +9,4 @@ add_subdirectory(stbiw)
 
 add_executable(main main.cpp rainbow.cpp mandel.cpp)
 target_link_libraries(main PUBLIC stbiw)
+
diff --git a/stbiw/CMakeLists.txt b/stbiw/CMakeLists.txt
index b56b853..dc56dd3 100644
--- a/stbiw/CMakeLists.txt
+++ b/stbiw/CMakeLists.txt
@@ -1 +1,2 @@
-message(FATAL_ERROR "请修改 stbiw/CMakeLists.txt！要求生成一个名为 stbiw 的库")
+add_library(stbiw STATIC stbiw.cpp)
+target_include_directories(stbiw PUBLIC .)
\ No newline at end of file
diff --git a/stbiw/stbiw.cpp b/stbiw/stbiw.cpp
new file mode 100644
index 0000000..2009b05
--- /dev/null
+++ b/stbiw/stbiw.cpp
@@ -0,0 +1,2 @@
+#define STB_IMAGE_WRITE_IMPLEMENTATION
+#include "stb_image_write.h"
\ No newline at end of file