diff --git a/Makefile b/Makefile
index d92c0f0..856ec53 100644
--- a/Makefile
+++ b/Makefile
@@ -1,14 +1,27 @@
 
 SOURCES = ./phc-logo.png
 
+TARGETS = ./derived/phc-logo@x1.png \
+          ./derived/phc-logo@x2.png \
+          ./derived/phc-logo@x4.png \
+          ./derived/phc-logo@x8.png
+
+.PHONY: help
+help:
+	@echo "SOURCES = $(SOURCES)"
+	@echo "TARGETS = $(TARGETS)"
+
 .PHONY: all
-all: $(SOURCES)
+all: $(TARGETS)
+
+derived/%@x1.png: %.png Makefile
+	magick convert $< -scale 100% $@
 
-derived/%@x1.png: %.png
-	magick convert $< -resize 100% $@
+derived/%@x2.png: %.png Makefile
+	magick convert $< -scale 200% $@
 
-derived/%@x2.png: %.png
-	magick convert $< -resize 200% $@
+derived/%@x4.png: %.png Makefile
+	magick convert $< -scale 400% $@
 
-derived/%@x4.png: %.png
-	magick convert $< -resize 400% $@
+derived/%@x8.png: %.png Makefile
+	magick convert $< -scale 800% $@
diff --git a/README.md b/README.md
index f7c8491..f3d7af4 100644
--- a/README.md
+++ b/README.md
@@ -2,4 +2,10 @@
 
 Repo con vari loghi del PHC.
 
-<img src="./phc-logo.png" alt="phc logo" />	
\ No newline at end of file
+<img src="./derived/phc-logo@x1.png" alt="phc logo" max-width="80%" />	
+
+<img src="./derived/phc-logo@x2.png" alt="phc logo" max-width="80%" />	
+
+<img src="./derived/phc-logo@x4.png" alt="phc logo" max-width="80%" />	
+
+<img src="./derived/phc-logo@x8.png" alt="phc logo" max-width="80%" />	
\ No newline at end of file
diff --git a/derived/phc-logo@x1.png b/derived/phc-logo@x1.png
new file mode 100644
index 0000000..98d1b2e
Binary files /dev/null and b/derived/phc-logo@x1.png differ
diff --git a/derived/phc-logo@x2.png b/derived/phc-logo@x2.png
new file mode 100644
index 0000000..e2165cb
Binary files /dev/null and b/derived/phc-logo@x2.png differ
diff --git a/derived/phc-logo@x4.png b/derived/phc-logo@x4.png
new file mode 100644
index 0000000..8ba4cfa
Binary files /dev/null and b/derived/phc-logo@x4.png differ
diff --git a/derived/phc-logo@x8.png b/derived/phc-logo@x8.png
new file mode 100644
index 0000000..02f9aad
Binary files /dev/null and b/derived/phc-logo@x8.png differ