diff --git a/Diagrams.ipynb b/images/Diagrams.ipynb
similarity index 100%
rename from Diagrams.ipynb
rename to images/Diagrams.ipynb
diff --git a/Makefile b/images/Makefile
similarity index 64%
rename from Makefile
rename to images/Makefile
index 1f48c9a..bda8562 100644
--- a/Makefile
+++ b/images/Makefile
@@ -4,7 +4,7 @@ TABLE_IMG := $(addsuffix .png, $(basename $(TABLE_HTML)))
 tmp.png: tmp.dot $(TABLE_IMG)
 	dot -Tpng -o tmp.png tmp.dot
 
-$(TABLE_IMG): %.png: %.html style-table.css
-	(echo '<style>'; cat style-table.css; echo '</style>'; cat $<) |\
+$(TABLE_IMG): %.png: %.html ../style-table.css
+	(echo '<style>'; cat ../style-table.css; echo '</style>'; cat $<) |\
 		wkhtmltoimage - tmp.png && convert -trim tmp.png $@
 
diff --git a/images/loop.sh b/images/loop.sh
new file mode 100755
index 0000000..0492d74
--- /dev/null
+++ b/images/loop.sh
@@ -0,0 +1 @@
+,make-loop ../style-table.css *.html Makefile tmp.dot
diff --git a/sample.csv b/images/sample.csv
similarity index 100%
rename from sample.csv
rename to images/sample.csv
diff --git a/tmp.dot b/images/tmp.dot
similarity index 100%
rename from tmp.dot
rename to images/tmp.dot
diff --git a/loop.sh b/loop.sh
deleted file mode 100755
index 2b4fa64..0000000
--- a/loop.sh
+++ /dev/null
@@ -1 +0,0 @@
-,make-loop style-table.css *.html Makefile tmp.dot
diff --git a/problems.txt b/problems.txt
deleted file mode 100644
index f5af9cd..0000000
--- a/problems.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-
-
-
-
-
-1.
-
-
-
-2.
-
-
-3.
-
-
-4.
-
-
-5.
-
-
-6.