diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..dabdb96
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,8 @@
+root = true
+
+[*]
+end_of_line = crlf
+insert_final_newline = true
+indent_size = 4
+charset = utf-8
+indent_style = tab
diff --git a/.gitignore b/.gitignore
index 4b9f15c..b9197c7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -53,14 +53,5 @@ Mkfile.old
 dkms.conf
 
 # ---> products
-# Substituted code
-formula_substituted.*
-
-# Executables
-*.a
-*.out
-*.exe
-render_bytebeat.*
-
-# Output
+build/
 output.wav
diff --git a/EXAMPLE_USAGE.txt b/EXAMPLE_USAGE.txt
index e52eec6..cecbc89 100644
--- a/EXAMPLE_USAGE.txt
+++ b/EXAMPLE_USAGE.txt
@@ -1,5 +1,4 @@
-$ cat | ./bytebeat_compiler.py - && ./render_bytebeat
-t&(t>>7)-t&t>>8
+$ echo 't&((t>>7)-t)&t>>8' | ./bytebeat_compiler.py - && ./render_bytebeat
 Compiling
 :: C bytebeat generator runtime unit
 
diff --git a/bytebeat_compiler.py b/bytebeat_compiler.py
index e9bc499..a2098fc 100644
--- a/bytebeat_compiler.py
+++ b/bytebeat_compiler.py
@@ -1,18 +1,33 @@
 #!/usr/bin/python3
 
-DEFAULT_PARAMETERS = {
-	"CC": "gcc",
-	"CC_FLAGS": "-Os -Wall -Werror -Wpedantic",
-	"INPUT_FILES": ["engine.c", "formula_substituted.c"],
-	"OUTPUT_FILE": "render_bytebeat"
-}
-
-from os.path import exists
-from os import system, environ
+from os.path import exists, join as path_join
+from os import system, environ, makedirs
 from argparse import ArgumentParser
 from sys import stdin
 import subprocess
 
+# Paths
+PATHS = {
+	"src_dir": "src/",
+	"build_dir": "build/",
+	"template": "template.c",
+	"substitute": "substituted.c",
+	"output": "render_bytebeat"
+}
+
+# Solve paths
+PATHS["template"] = path_join(PATHS["src_dir"], PATHS["template"])
+PATHS["substitute"] = path_join(PATHS["build_dir"], PATHS["substitute"])
+PATHS["output"] = path_join(PATHS["build_dir"], PATHS["output"])
+
+# Default parameters
+DEFAULT_PARAMETERS = {
+	"CC": "gcc",
+	"CC_FLAGS": "-Os -Wall -Werror -Wpedantic",
+	"INPUT_FILE": PATHS["substitute"],
+	"OUTPUT_FILE": PATHS["output"]
+}
+
 def fetch(name: str):
 	return res if (res := environ.get(name)) else DEFAULT_PARAMETERS[name]
 
@@ -36,16 +51,14 @@ def substitute_value(placeholder: str, replacement, text: str) -> str:
 
 CC = fetch("CC")
 CC_FLAGS = fetch("CC_FLAGS")
-INPUT_FILES = fetch("INPUT_FILES")
+INPUT_FILE = fetch("INPUT_FILE")
 OUTPUT_FILE = fetch("OUTPUT_FILE")
 
 if __name__ == "__main__":
-	print("Bytebeat compiler")
-
 	parser = ArgumentParser(description=\
 		"Substitutes supplied C (non-JavaScript!) bytebeat into the template, "
 		"then attempts to compile the instance of the template. Uses "
-		"environmental variables `CC`, `CC_FLAGS`, `INPUT_FILES`, "
+		"environmental variables `CC`, `CC_FLAGS`, `INPUT_FILE`, "
 		"`OUTPUT_FILE`.")
 	parser.add_argument("file", type=str,
 		help="bytebeat formula file")
@@ -69,31 +82,29 @@ if __name__ == "__main__":
 		print("No valid contents")
 		raise SystemExit
 
-	# Substitute all placeholders in formula_template.c -> formula_substitute.c
+	# - Compilation
+	makedirs(PATHS["build_dir"], exist_ok=True)
+
 	if not args.no_return:  # Insert return statement
 		bytebeat_contents = f"\treturn\n\n{bytebeat_contents}"
 
-	substitute_c = read_file("formula_template.c")
-	substitute_c = substitute_value("bytebeat_contents",
-		bytebeat_contents, substitute_c)
-	rewrite_file("formula_substituted.c", substitute_c)
-
-	# Substitute all placeholders in formula_template.h -> formula_substitute.h
-	substitute_h = read_file("formula_template.h")
-	substitute_h = substitute_value("sample_rate",
-		args.sample_rate, substitute_h)
-	substitute_h = substitute_value("bit_depth",
-		args.bit_depth, substitute_h)
-	substitute_h = substitute_value("is_signed",
-		"1" if args.signed else "0", substitute_h)
-	substitute_h = substitute_value("channels",
-		args.channels, substitute_h)
-	substitute_h = substitute_value("seconds",
-		args.seconds, substitute_h)
-	rewrite_file("formula_substituted.h", substitute_h)
+	substitute = read_file(PATHS["template"])
+	substitute = substitute_value("bytebeat_contents",
+		bytebeat_contents, substitute)
+	substitute = substitute_value("sample_rate",
+		args.sample_rate, substitute)
+	substitute = substitute_value("bit_depth",
+		args.bit_depth, substitute)
+	substitute = substitute_value("is_signed",
+		"1" if args.signed else "0", substitute)
+	substitute = substitute_value("channels",
+		args.channels, substitute)
+	substitute = substitute_value("seconds",
+		args.seconds, substitute)
+	rewrite_file(PATHS["substitute"], substitute)
 
 	# Compile by invoking the shell script
 	print("Compiling")
 
-	# Let system execute aliases by calling os.system
-	system(" ".join([CC, CC_FLAGS, *INPUT_FILES, "-o", OUTPUT_FILE]))
+	# Let the system execute aliases by calling os.system
+	system(" ".join([CC, CC_FLAGS, INPUT_FILE, "-o", OUTPUT_FILE]))
diff --git a/documentation.md b/documentation.md
new file mode 100644
index 0000000..9e5af6c
--- /dev/null
+++ b/documentation.md
@@ -0,0 +1,7 @@
+# C_bytebeat_render
+
+## Bytebeat code
+
+**Variables:**
+- `w`: `long double`
+- `t`: `w` casted as `uintmax_t`
diff --git a/formula_template.c b/formula_template.c
deleted file mode 100644
index 28c9e12..0000000
--- a/formula_template.c
+++ /dev/null
@@ -1,13 +0,0 @@
-#include <stdint.h>
-
-#include "formula_substituted.h"
-
-SAMPLE_TYPE
-bytebeat(long double w)
-{
-	uintmax_t t = (uintmax_t)w;
-
-	`bytebeat_contents`
-
-	  ;
-}
\ No newline at end of file
diff --git a/formula_template.h b/formula_template.h
deleted file mode 100644
index c30c6f5..0000000
--- a/formula_template.h
+++ /dev/null
@@ -1,23 +0,0 @@
-#ifndef _FORMULA_TEMPLATE_H
-#define _FORMULA_TEMPLATE_H
-
-#define SAMPLE_RATE `sample_rate`
-#define BIT_DEPTH `bit_depth`
-#define IS_SIGNED `is_signed`
-#define CHANNELS `channels`
-#define SECONDS `seconds`
-
-#if BIT_DEPTH <= 8
-#define SAMPLE_TYPE uint8_t
-#elif BIT_DEPTH >= 16
-#if IS_SIGNED
-#define SAMPLE_TYPE int16_t
-#else
-#define SAMPLE_TYPE uint16_t
-#endif
-#endif
-
-SAMPLE_TYPE
-bytebeat(long double w);
-
-#endif /* _FORMULA_TEMPLATE_H */
diff --git a/engine.c b/src/template.c
similarity index 86%
rename from engine.c
rename to src/template.c
index d85ecb6..6137f48 100644
--- a/engine.c
+++ b/src/template.c
@@ -7,8 +7,7 @@
 #include <string.h>
 #include <time.h>
 
-#include "formula_substituted.h"
-
+// constants
 #if defined(_WIN32)
 #define __ANSI_CLEAR_STRING "\r"
 #elif defined(__unix__) || defined(__linux__)
@@ -18,6 +17,22 @@
 #endif
 const char* ANSI_CLEAR = __ANSI_CLEAR_STRING;
 
+#define SAMPLE_RATE `sample_rate`
+#define BIT_DEPTH `bit_depth`
+#define IS_SIGNED `is_signed`
+#define CHANNELS `channels`
+#define SECONDS `seconds`
+
+#if BIT_DEPTH <= 8
+#define SAMPLE_TYPE uint8_t
+#elif BIT_DEPTH >= 16
+#if IS_SIGNED
+#define SAMPLE_TYPE int16_t
+#else
+#define SAMPLE_TYPE uint16_t
+#endif
+#endif
+
 #define PRODUCT (SAMPLE_RATE * SECONDS * CHANNELS)
 #define FREQUENCY_OF_STATUS_REPORTING 5000
 
@@ -33,9 +48,20 @@ const char* dbgpnt_labels[3] = { "memory allocation",
 #define dbgpnt_labels_size                                                     \
 	(unsigned int)(sizeof(dbgpnt_labels) / sizeof(dbgpnt_labels[0]))
 
-bool silent_mode = 0;
-bool debug_mode = 0;
+// global variables
+bool silent_mode = false, debug_mode = false;
 
+// function prototypes
+void
+debug_print(void);
+
+long double
+random(void);
+
+SAMPLE_TYPE
+bytebeat(long double w);
+
+// function implementations
 void
 debug_print(void)
 {
@@ -66,6 +92,16 @@ random(void)
 	return (long double)rand() / RAND_MAX;
 }
 
+SAMPLE_TYPE
+bytebeat(long double w)
+{
+	uintmax_t t = (uintmax_t)w;
+
+	`bytebeat_contents`
+
+	;
+}
+
 int
 main(int argc, char** argv)
 {