diff --git a/3dna.py b/3dna.py
index bb554c6..30afbdf 100644
--- a/3dna.py
+++ b/3dna.py
@@ -79,9 +79,9 @@
 			# output last chromosome
 			if current_chromosome != "":
 				print "hull(){"
-				print "cylinder(r=50,h=10);"
-				print "translate(v=[0,0,%d]){" % (int(current_chromosome) * 5)
-				print "linear_extrude(height=%d,center=true,convexity=10){" % (int(current_chromosome) * 5)
+				print "cylinder(r=50,h=20);"
+				print "translate(v=[0,0,%d]){" % (int(current_chromosome) * 10)
+				print "linear_extrude(height=%d,center=true,convexity=10,twist=-100){" % 20 #(int(current_chromosome) * 5)
 				print "polygon(points=%s,paths=[%s]);" % (points, vectors)
 				print "}}}"
 
diff --git a/examples/genome/short_gnome.txt b/examples/genome/short_gnome.txt
new file mode 100644
index 0000000..0d8bbe8
--- /dev/null
+++ b/examples/genome/short_gnome.txt
@@ -0,0 +1,59 @@
+# This data file generated by 23andMe at: Fri Jan 11 12:19:11 2013
+#
+# Below is a text version of your data.  Fields are TAB-separated
+# Each line corresponds to a single SNP.  For each SNP, we provide its identifier 
+# (an rsid or an internal id), its location on the reference human genome, and the 
+# genotype call oriented with respect to the plus strand on the human reference sequence.
+# We are using reference human assembly build 37 (also known as Annotation Release 104).
+# Note that it is possible that data downloaded at different times may be different due to ongoing 
+# improvements in our ability to call genotypes. More information about these changes can be found at:
+# https://www.23andme.com/you/download/revisions/
+# 
+# More information on reference human assembly build 37 (aka Annotation Release 104):
+# http://www.ncbi.nlm.nih.gov/mapview/map_search.cgi?taxid=9606
+#
+# rsid	chromosome	position	genotype
+rs4477212	1	82154	AA
+rs3094315	1	752566	AA
+rs3131972	1	752721	GG
+rs12124819	1	776546	AG
+rs11240777	1	798959	GG
+rs6681049	1	800007	CC
+rs4970383	1	838555	AC
+rs4475691	1	846808	CT
+rs7537756	1	854250	AG
+rs13302982	1	861808	GG
+rs1110052	1	873558	GT
+rs2272756	1	882033	AG
+rs3748597	1	888659	CC
+rs13303106	1	891945	AG
+rs28415373	1	893981	CC
+rs13303010	1	894573	AA
+rs6696281	1	903104	CC
+rs28391282	1	904165	GG
+rs2340592	1	910935	AG
+rs13303118	1	918384	GT
+rs2053526	4	78426029	AG
+rs17002713	4	78432340	CC
+rs17002716	4	78448018	GG
+rs17406477	4	78456502	GG
+rs1077234	4	78459361	AG
+rs1596231	4	78464698	AG
+rs355679	4	78478506	GT
+rs355667	4	78495883	CG
+rs189587	4	78500085	AG
+rs10009964	4	78500673	TT
+rs355684	4	78503963	CT
+rs355686	4	78505372	CT
+rs355687	4	78505578	CT
+rs355689	4	78507797	TT
+rs2584819	4	78509804	GG
+rs920666	4	78511203	TT
+rs1867106	4	78511756	CC
+rs17002731	4	78513987	GG
+rs171388	4	78521525	CC
+rs355661	4	78523092	AA
+rs1875266	4	78527482	AA
+rs2903289	4	78530068	AA
+rs17002743	4	78531932	CC
+i4000759	MT	16567	A
\ No newline at end of file