I need help in trying to enlarge this baby afghan to an adult size and if I can make this with 2 strands of worsted held together. I am a beginner in altering patterns and am not sure about the repeat, etc. Thank you in advance for anyone's help.

knitculture.com/wordpress/wp-content/uploa
ds/2011/09/reversiblecableblanket.pdf

Sorry, the link did not cut and paste. If someone can help, just copy and paste the above. Thank you again.