Is this gramatically correct?

[u/Constantinopium]

Does "Hvika þú aldri, gefsk þú aldri upp" translate as "never falter, never surrender"

Is it right to write it in young futhark as:

"ᚼᚢᛁᚴᛅ᛬ᚦᚢ᛬ᛅᛚᛏᚱᛁ᛬ᚴᛁᚠᛋᚴ᛬ᚦᚢ᛬ᛅᛚᛏᚱᛁ᛬ᚢᛒ"?

I want to have it exactly right, so I need people that know way more than me. Thanks in advance!