\starttext

\startmode[mkiv]

    \startluacode
        tex.sprint("hello")
    \stopluacode

    \startMPcode
        draw textext("hello") rotated 45 ;
    \stopMPcode

    \framed{hello}

\stopmode

\startnotmode[mkiv]

    \startMPcode
        draw textext("hello") rotated -45 ;
    \stopMPcode

    \framed{hello}

\stopnotmode

\stoptext